User:Tonygameman/Capcom Rivalries

Nintendo

 * Mario = Ryu
 * Luigi = Ken Masters
 * Peach = Chun-Li
 * Bowser = M. Bison
 * Captain Toad (or Henry Fleming) = Edward Falcon
 * Yoshi = Regina
 * Wario = Ruby Heart
 * Waluigi = Dan Hibiki
 * Donkey Kong = Mike Haggar
 * Diddy & Dixie Kong (tag team character) = SonSon
 * King K. Rool = E. Honda
 * Link = Dante
 * Zelda = Tessa
 * Ganondorf = Albert Wesker
 * Kirby = Classic Mega Man
 * Shulk = Monster Hunter
 * Rex (with Pyra & Mythra) = Mega Man X
 * Samus Aran = Jill Valentine
 * Ridley = Nemesis T-Type
 * Mr. Game & Watch = Servbot
 * TBD = Roll
 * Meta Knight = Zero
 * Pikachu = Amaterasu
 * Machamp = Zangief
 * Incineroar = Alex
 * Greninja = Strider Hiryu
 * Mewtwo = Akuma
 * Captain Falcon = Captain Commando
 * Blood Falcon = Kage
 * Black Shadow = Jedah Dohma
 * Pit = Morrigan Aensland
 * Palutena = Ingrid
 * Jigglypuff = Felicia
 * Villager = Baby Bonnie Hood
 * Samurai Goroh = Bishamon
 * Wolf O' Donnell = Jon Talbain
 * Fox McCloud = Chris Redfield
 * Falco Lombardi = Leon S. Kennedy
 * Alexandra Roivas = Claire Redfield
 * Ness = Sissel (Ghost Trick)
 * Marth = The Arisen (Dragon's Dogma)
 * Lyn = Linn Kurosawa
 * Robin = Vergil
 * Chrom = Maximo
 * Corrin = Nero
 * Byleth = TBD
 * Olimar = Sir Arthur
 * Little Mac = Batsu Ichimonji
 * Ice Climbers = Zack & Wiki
 * Takamaru = Yukimura Sanada (or Kaijin no Soki)
 * Min Min = Nathan "Rad" Spencer
 * Spring Man = Dhalsim
 * Isaac = Ryu (Breath of Fire)
 * Saki Amamiya = Hayato Kanzaki
 * Inkling = Momotaro (Pirate Ship Higemaru)
 * Wonder Red = Viewtiful Joe
 * Akira Howard/Legionis = Jin Saotome
 * Toy-Con Robot = PTX-40A
 * Raymond Bryce = Frank West
 * Star Man (Pro Wrestling) = The Great Oni
 * Kyle Hyde (or Ayumi Tachibana) = Phoenix Wright

PlayStation/Sony

 * Cole MacGrath (with some of his moves from Street Fighter X Tekken) = Ryu
 * Kessler = Akuma
 * Dart Feld = Dante
 * Delsin Rowe = Batsu Ichimonji
 * Kat & Dusty = Chun-Li
 * Nathan Drake = Leon S. Kennedy
 * Kratos = Asura
 * Aloy = Monster Hunter
 * Joel & Ellie = Frank West
 * Slayer of Demons = Sir Arthur (both are knights, who fought against demons and originated from extremely hard games)
 * Emmett Graves = Nathan "Rad" Spencer
 * Sackboy = Amaterasu
 * Ratchet & Clank = Classic Mega Man
 * Sly Cooper = Strider Hiryu
 * Jak & Daxter = Mega Man X
 * Sir Daniel Fortesque = Maximo (heroic knights who are resurrected from the dead and are related to skeletons; Dan being one himself and Maximo being accompanied with Grim, a Grim Reaper itself)
 * Pursuit Force Commander = Jill Valentine
 * Jodie Holmes = Fiona Belli
 * Spike = Zack & Wiki
 * Gabriel Logan = Chris Redfield
 * Gran Turismo Driver = Captain Commando

Guests

 * Crash Bandicoot
 * Cloud Strife
 * Sonic the Hedgehog
 * Spyro the Dragon

Sega

 * Sonic = Classic Mega Man (or Mega Man X)
 * Knuckles = Proto Man
 * Tails = Rush (with Beat & Eddie as assist characters)
 * Shadow/Ethan Waber = Zero
 * Amy Rose = Roll
 * Metal Sonic = Bass
 * Dr. Eggman = Dr. Wily
 * Silver = Axl
 * Bark = Sasquatch
 * Akira Yuki = Ryu
 * Sarah Bryant = Cammy White
 * Jacky Bryant = Ken Masters
 * Pai Chan = Chun-Li
 * Shun Di = Gen
 * Wolf Hawkfield = Alex
 * Dural = M. Bison/Akuma
 * Kazuma Kiryu = Gene/Phoenix Wright
 * Goro Majima = Dan Smith (Killer7)
 * Ryo Hazuki/Bahn = Batsu Ichimonji/Ryu or Ko (Avengers)
 * Bayonetta = Dante
 * Jeanne = Trish
 * Joker = Vergil
 * Zephyr = Lady
 * BD Joe = Frank West
 * Jack Cayman = Chuck Greene
 * Sam Gideon = Lonely Astronaut (Section Z)
 * Axel Stone = Cody Travers
 * Max Thunder = Mike Haggar
 * Shiva = Guy
 * Nagi Hojo = Maki
 * Green Mask (Pro Wrestling) = The Great Oni
 * Raxel = Lord Raptor
 * NiGHTS = Morrigan
 * Amitie = Lilith
 * Agent G = Chris Redfield
 * Michael Hardy (Virtua Cop) = Leon S. Kennedy
 * Magician = Nemesis T-Type
 * Hierophant = Hydron
 * Cyborg George Washington (Empire: Total War) = Albert Wesker
 * John Mayor (Deep Fear) = Regina
 * Beat = Yun/Shiba (Cannon Spike)/Con Smith (Killer7)
 * Ulala = Felicia/June (Star Gladiator)
 * Larcen Tyler/Nino (Aztec Adventure) = Edward Falcon
 * Arle Nadja = Pure & Fur
 * Midknight = Jedah/Demitri Maximoff
 * Shadow (Eternal Champions) = Ibuki
 * Xavier = Tessa
 * Gilius Thunderhead/Wonder Boy = Sir Arthur/Maximo
 * Ax Battler = Leo (Red Earth)
 * Tyris Flare = Michelle Heart
 * Death Adder = Black Tiger
 * Max (Shining Force) = Ryu (Breath of Fire)
 * Nei = Katt
 * Centurion = Gill/Amaterasu
 * Billy Hatcher = Momotaro (Pirate Ship Higemaru)
 * AiAi = Zack & Wiki
 * Alex Kidd = SonSon
 * Headdy = Lou (Three Wonders)
 * Sketch Turner/Kid Chameleon/Bug = Viewtiful Joe
 * Taro Yamada (Rent-A-Hero)/Segata Sanshiro = Captain Commando
 * Joe Musashi = Strider Hiryu
 * Hotsuma = Kenji (Red Earth)
 * Zeed = Anakaris
 * Opa-Opa = Super Ace (1942)
 * F-14 Tomcat (After Burner) = F/A-18 Hornet (Carrier Air Wing)
 * Space Harrier = Unknown Soldier (Forgotten Worlds)
 * Gunstar Red = Saki Omokane/Jin Saotome
 * Duke Oda = Mobilesuit (Side Arms)
 * Alis Landale/Hunter (Phantasy Star Online 2) = Monster Hunter
 * Rolf = Hayato Kanzaki
 * Edge (Panzer Dragoon) = The Arisen (Dragon's Dogma)
 * Temjin (Virtual-On) = PTX-40A/G Red (Gotcha Force)/G. Kaiser (Tech Romancer)
 * Sakura Shinguji = Date Masamune
 * Gemini Sunrise = Linn Kurosawa
 * Selvaria Bles = Asura
 * Shou Amabane = Sieg Warheit
 * Ali (Beyond Oasis)/Raikoh (Otogi) = Alan (Magic Sword)/Samanosuke Akechi
 * Amigo/ToeJam & Earl = Amingo
 * Astal = Devilotte
 * Vyse = Ruby Heart
 * Ristar = Nathan Spencer
 * Vectorman = Huitzil

Bandai-Namco Entertainment

 * Ryu = Jin Kazama
 * Ken Masters = Paul Phoenix
 * Chun-Li = Ling Xiaoyu
 * Cammy White = Nina Williams
 * E. Honda = Ganryu
 * Sakura Kasugano = Asuka Kazama
 * Mike Haggar = King
 * M. Bison = Kazuya Mishima
 * Akuma = Heihachi Mishima
 * Morrigan Aensland = Ivy Valentine
 * Donovan = Mitsurugi
 * Hsien-Ko = Taki
 * Lord Raptor = Lizardman
 * Gill = Nightmare
 * Classic Mega Man = Pac-Man
 * Mega Man X = TBD
 * Zero = Yoshimitsu
 * Roll = Alisa Bosconovitch
 * Mega Man Volnutt = Taizo Hori
 * Dante = Yuri Lowell
 * Vergil = Lloyd Irving
 * Chris Redfield = Alan Dunaway
 * Leon S. Kennedy = Richard Miller
 * Albert Wesker = Wild Dog
 * Nemesis T-Type = Rick Taylor
 * Lady (Devil May Cry) = Velvet Crowe
 * Trish = Rin Shibuya (appears in her Granblue Fantasy appearance/outfit and moveset)
 * Michelle Heart = Valkyrie
 * Monster Hunter = Chosen Undead
 * Sir Arthur = Gilgamesh & Ki
 * Astaroth = Druaga
 * Maximo = Tarosuke
 * Firebrand = Agumon
 * Saki Omokane = Toby "Kissy" Masuyo
 * Jin Saotome = Wonder Momo
 * Captain Commando = Bravoman
 * Batsu Ichimonji = Brad Hawk
 * Amaterasu = Klonoa
 * Phoenix Wright = The Prince of All Cosmos
 * Strider Hiryu = Kite
 * Gene = Soma Schicksal
 * Asura = KOS-MOS
 * Nathan "Rad" Spencer = TBD
 * Frank West = Jack Slate
 * Viewtiful Joe = Dr. Dan (Point Blank)
 * Unknown Soldier = Hiromi Tengenji
 * Regina = Albatross (Leila appear as an alternate costume with different voice clips)
 * Kaijin no Soki = Clovis
 * Date Masamune = Taira no Kagekiyo
 * Uesugi Kenshin & Kasuga = Reiji Arisu & Xiaomu
 * Ryu (Breath of Fire) = Amul (Dragon Spirit)
 * Kyosuke Kagami = Touma Amagase
 * Akira Kazama = Makoto Kikuchi (though Haruka and Iori also appear as Assists for her)
 * Edward Falcon (ending involves Red Baron) = Reiko Nagase

SNK Corporation
While not a Capcom game, there's a sandbox page for DC Universe vs. SNK.

Street Fighter X Fatal Fury

 * Ryu = Terry Bogard
 * Ken Masters = Andy Bogard
 * Guile = Kim Kaphwan
 * Chun-Li = Mai Shiranui
 * Cammy White = Blue Mary
 * Dan Hibiki = Joe Higashi
 * E. Honda = Cheng Shinzan
 * Dhalsim = Sokaku Mochizuki
 * Zangief = Raiden/Big Bear
 * Alex = Rock Howard
 * Fei Long = Hon-Fu
 * Sakura Kasugano = Li Xiangfei (or Alice Nakata)
 * Dee Jay = Duck King
 * T. Hawk = Rick Strowd
 * Gouken = Tung Fu Rue
 * Dudley = Michael Max
 * El Fuerte = Tizoc
 * Adon = Hwa Jai
 * Yun = Jin Chonshu
 * Yang = Jin Chonrei
 * Gen = Jubei Yamada
 * Blanka = Bob Wilson
 * Cody = Ryuji Yamazaki
 * Guy = Hokutomaru
 * Urien = Marco Rodriguez
 * Rose = Freeman (Garou)
 * Rashid = Billy Kane
 * Karin = Hotaru Futaba
 * R. Mika = B. Jenet
 * Juri Han = Grant
 * Balrog = Franco Bash
 * Vega = Laurence Blood
 * Sagat = Geese Howard
 * M. Bison = Wolfgang Krauser
 * Gill = Kain R. Heinlein
 * Akuma = Ryo Sakazaki (Secret)
 * Evil Ryu = Nightmare Geese (Secret)

Capcom vs. SNK 3

 * Ryu = Kyo Kusanagi
 * Akuma = Iori Yagami
 * Ken Masters = Terry Bogard
 * Dan Hibiki = Ryo Sakazaki
 * Chun-Li = Mai Shiranui
 * Cammy White = King (Art of Fighting)
 * Blanka = Genan Shiranui
 * Sakura Kasugano = Yuri Sakazaki
 * Zangief = Raiden/Big Bear
 * Sagat = Geese Howard
 * M. Bison = Rugal Bernstein
 * Batsu Ichimonji = Shingo Yabuki
 * Ingrid = Athena Asamiya
 * Juri Han = Juri (Galaxy Fight)
 * Edward Falcon = Alfred Airhawk (Fatal Fury)
 * Elena = Momoko
 * Cody Travers = Duke Edwards (Burning Fight)
 * Bishamon = Haohmaru
 * Amaterasu = Nakoruru
 * Morrigan Aensland = Shiki
 * Felicia = Cham Cham (Samurai Shodown)
 * Demitri Maximoff = Jivatma
 * Pyron = Felden (Galaxy Fight)
 * Chris Redfield = Marco Rossi
 * Jill Valentine = Fio Germi
 * Leon S. Kennedy = Clark Still
 * Nathan Spencer = Ralf Jones
 * Classic Mega Man = Roddy (Top Hunter: Roddy & Cathy)
 * Roll = TBD
 * Mega Man X = Yuki (Neo Geo Battle Coliseum)
 * Zero = Moriya Minakata
 * Samanosuke Akechi = Kaede
 * Strider Hiryu = Hanzo Hattori (World Heroes)
 * Dante = TBD
 * Vergil = Slash (Waku Waku 7)
 * Nero = Rock Howard
 * Date Masamune = Kagetsura (Sengoku 3)
 * Tessa = Elta (Magician Lord)
 * Captain Commando = Rolf (Galaxy Fight)
 * Sir Arthur = Goddess Athena
 * Monster Hunter = TBD
 * Rathalos = Geon (King Of The Monsters)
 * Leo (Red Earth) = King Lion (Savage Reign)
 * Jin Saotome (with Blodia) = Cyber Woo (King of the Monsters)
 * Oichi (Sengoku Basara) = Shiki
 * Hayato Kanzaki = Sho Hayate
 * Unknown Soldier = Rocky (Robot Army)
 * Michelle Heart = Load Ran (Twinkle Star Sprites)
 * Ton Pooh (Strider) = Hibiki Takane
 * Devilotte = Roomi (Galaxy Fight)
 * Ryu (Breath of Fire) = Lu Bu (World Heroes)
 * Saki Omokane = Jeanne D'Arc
 * Lou = Marurun (Waku Waku 7)
 * Spider (Mega Man X) = G-Mantle
 * Ruby Heart = Captain Kidd (World Heroes)
 * Gill = Orochi (sub-bosses)

Konami

 * Ryu = Oolong (Yie ar Kung Fu)
 * Chun-Li = Quiet (Metal Gear)
 * Chris Redfield = Solid Snake
 * Dante = Raiden
 * Classic Mega Man = Bomberman
 * Sir Arthur = Simon Belmont
 * Zero = Alucard
 * Date Masamune = Getsu Fuma (Getsu Fuma Den)
 * Jin Saotome (Cyberbots) = Leo Stenbuck (Zone of the Enders)
 * PTX-40A (Lost Planet) = TwinBee
 * Felyne (Monster Hunter) = Sparkster
 * Strider Hiryu = Goemon
 * Amaterasu/Mega Man.EXE = Solar Boy Django
 * Mike Haggar = Hawk (Vendetta)
 * Akira Kazama = Reiko Hinomoto (Rumble Roses)
 * Captain Commando = Konami Man (Wai Wai World)
 * Nathan Spencer = Bill Rizer
 * Nemesis T-Type = Pyramid Head
 * Akuma = Yugo Ogami (Bloody Roar)
 * Date Masamune = Getsu Fuuma
 * Billy Bob (GunSmoke) = Steve (Sunset Riders)
 * Ryu (Breath of Fire) = Tir McDohl (Suidoken)
 * Jedah = Dracula

Final Fantasy vs. Capcom

 * Cloud Strife = Ryu
 * Tidus = Ken Masters
 * Tifa Lockhart = Chun-Li
 * Vincent Valentine = Dante
 * Onion Knight (based on his Dissidia Final Fantasy appearances) = Sir Arthur
 * Yuffie Kisaragi = Maxino
 * Edward "Edge" Geraldine = Strider Hiryu
 * Locke Cole = Edward Falcon
 * ViVi Ornitier = Classic Mega Man
 * Kain Highwind = Proto Man
 * Barret Wallace = Mega Man X
 * Bartz Klauser = Axl
 * Jecht = Mike Haggar
 * Rikku (Final Fantasy X) = Roll Caskett
 * Warrior of Light = Monster Hunter
 * Shanotto = Classic Roll
 * Cecil Harvey = Vergil
 * Firion = Nero
 * Noctis Lucis Caelum = Morrigan Aensland
 * Zack Fair = Zero
 * Zidane Tribal = SonSon
 * Squall "Leon" Leonhart = Chris Redfield
 * Gilgamesh = Nemesis T-Type
 * Ultimecia = Juri Han
 * Lightning Farron = Jill Valentine
 * Laguna Loire = Leon S. Kennedy
 * Yuna = Rose (Street Fighter)
 * Kuja = Jedah Dohma
 * Rydia = Felicia
 * Kefka Palazzo = Albert Wesker
 * Sephiroth = Akuma
 * Garland = Gill
 * Golbez = M. Bison

Square-Enix vs. Capcom

 * Ryu = Cloud Strife
 * Dante = Squall "Leon" Leonhart
 * Chun-Li = Tifa Lockhart
 * Mike Haggar = Sabin (Final Fantasy VI)
 * Vergil = Cecil Harvey
 * Nero = Noctis Lucis Caelum
 * Lucia Morgan = Aranea Highwind
 * Amaterasu = Auron
 * SonSon = Zidane Tribal
 * Classic Mega Man = ViVi Ornitier
 * Proto Man = Zack Fair
 * Roll = Shanotto
 * Akuma = Sephiroth
 * Sir Arthur = Erdrick
 * Firebrand = Rocket/Slime
 * Ryu (Breath of Fire) = Crono (time traveling)
 * Batsu Ichimonji = Neku Sakuraba
 * Gill = Dark Lord (Mana)
 * Regina = Wei Shen (Sleeping Dogs)
 * Nathan Spencer = Rico Rodriguez
 * Mega Man X = Barret Wallace
 * Zero = 2B
 * Asura = Nier (Father)
 * Ada Wong = Yuna (Final Fantasy X/X2)
 * Leon S. Kennedy = Laguna Loire
 * Jill Valentine = Lara Croft
 * Albert Wesker = King Bradley
 * Strider Hiryu = Garrett (Thief)
 * Jon Talbain = Raziel
 * Chris Redfield = Adam Jensen
 * Demitri Maximoff = Kain
 * Blanka = Gex
 * Fiona Belli = Aya Brea
 * Trish = Mitochondria Eve
 * Michelle Heart = Lenneth Valkyrie
 * Nina (Breath of Fire) = Alicia (Valkyrie Profile 2)
 * Felicia = Meracle Chamlotte (Star Ocean IV)
 * Viewtiful Joe = Sonic Blast Man
 * Jin Saotome = Edward Elric
 * Juri Han = Ultimecia
 * M. Bison = Gilgamesh
 * Pyron = Rhapthrone

Ubisoft

 * Ezio Auditore da Firenze = Ryu
 * Just Dance Trainer (She will be given the Wii Fit Trainer treatment and she is a Woman in the game) = Chun-Li
 * Sam Fisher = Chris Redfield
 * John Tanner = Jill Valentine
 * Dan Miles (C.O.P.: The Recruit) = Leon Scott Kennedy
 * Rayman = Amaterasu
 * Barbara = Sir Arthur
 * Raving Rabbid = Servbot
 * Aurora (Child of Light) = Morrigan Aensland
 * Prince (Prince of Persia) = Dante
 * Cesare Borgia = Albert Wesker
 * Rex "Power" Colt = Classic Mega Man
 * Marcus Holloway = Mega Man X
 * Altaïr Ibn-La'Ahad = Zero
 * Jacob Frye = Axl (Mega Man X)
 * Evie Frye = Marino (Mega Man X)

Universal/DreamWorks Animation/Illumination Studios

 * Po = Ryu
 * Master Tigress = Chun-Li
 * Master Shifu = Gouken
 * Marty McFly = Mega Man X
 * Woody Woodpecker = Classic Mega Man
 * Shrek = Morrigan Aensland
 * Dominic Toretto = Mike Haggar
 * Balto = Amaterasu
 * Michael Knight and KITT = Chris Redfield
 * Sonny Crockett = Jill Valentine
 * Owen Grady = Leon S. Kennedy

Sunrise

 * Domon Kasshu = Ryu

Kodasha
For Capcom vs. Tezuka Star System, there's an another sandbox page.


 * Natsu Dragneel = Ryu
 * Usagi Tsukuno/Sailor Moon = Chun-Li
 * Bean Bandit = Chris Redfield
 * Motoko Kusanagi = Jill Valentine
 * Tiger Mask = Mike Haggar
 * Ippo Makunouchi = Batsu Ichimonji
 * Kyo (Demon Eyes Kyo) = Dante
 * Hikaru Shidou = Trish
 * Syaoran Li = Hsien-Ko
 * Shinichi Izumi = Morrigan Aensland
 * Sakura Kinomoto = Nina (Breath of Fire)
 * Erythrocyte = Roll
 * Gon = Amaterasu
 * Astro Boy = Classic Mega Man

My Hero Academia vs. Capcom

 * Deku = Ryu
 * Uravity = Chun-Li
 * All Might = Captain Commando
 * Katsuki Bakugo = Proto Man
 * TBD = TBD

Shonen Jump vs. Capcom

 * Son Goku = Ryu
 * Vegeta = Ken Masters
 * Frieza = M. Bison
 * Kid Goku = SonSon
 * Broly = Asura
 * Gintoki Sakata = Captain Commando (both are fourth-wall breakers)
 * Kinnikuman (aka King Muscle) = Mike Haggar
 * Akuma Shogun = Hugo
 * Yusuke Urameshi = Batsu Ichimonji
 * Younger Toguro = Albert Wesker
 * Sosuke Aizen = Gill
 * Hiei - Nero
 * Raku Ichijou = Guy
 * Yuuma Kuga = Chris Redfield
 * Ryo Saeba = Leon S. Kennedy
 * Ichigo Kurosaki = Dante
 * Momotaro Tsurugi = Vergil
 * Kenshiro = Gene (God Hand)
 * Raoh = Akuma
 * Toriko = Monster Hunter (both are hunters)
 * Arale Norimaki = Roll
 * Izuku Midoriya/Deku = Classic Mega Man (Both of them are Youths who gain powers from various sources)
 * Katsuki Bakugo = Proto Man
 * Yu Takeyama/Mt. Lady = Lady Dimitescu
 * Roronoa Zoro = Date Masamune
 * Monkey D. Luffy = Edward Falcon
 * Boa Hancock = Ruby Heart
 * Hitomi Kisugi = Chun-Li
 * Cobra (Space Adventure Cobra) = Mega Man X
 * Ochaco Uraraka/Uravity = Axl
 * Yamato Agari (Ultimo) = Zero
 * Naruto Uzumaki = Strider Hiryu
 * Sasuke Uchiha = Kenji (Red Earth)
 * Sakura Haruno = Akira Kazama
 * Chitoge Kirisaki = Lucia Morgan
 * Madara Uchiha = Gill
 * Pegasus Seiya = Sir Arthur
 * Gin (Silver Fang/Ginga: Nagareboshi Gin) = Amaterasu
 * Jotaro Kujo = Jin Saotome
 * Jolyne Cujoh = Jill Valentine
 * Giorno Giovanna = Jake Muller
 * Yugi Muto = Demitri Maximoff
 * Medaka Kurokami = Morrigan Aensland
 * Kenshin Himura = Kaijin no Soki
 * Allen Walker = Nathan "Rad" Spencer
 * Tanjiro Kamado = Leo (Red Earth)
 * All Might = Viewtiful Joe
 * Gon Freecss = Cody
 * Killua Zoldyck = Blanka
 * Kankichi Ryotsu (KochiKame) = Frank West
 * Light Yagami = Phoenix Wright
 * Tsunayoshi Sawada = Nobuanga Oda
 * Dio Brando = Pyron

Hasbro

 * Green Ranger (Tommy Oliver) = Ryu
 * Scarlet (G.I. Joe) = Chun-Li
 * Duke (G.I. Joe) = Chris Redfield
 * Optimus Prime = Mega Man X
 * Grid Battleforce Red Ranger (Devon Daniels) = Zero
 * Bumblebee = Classic Mega Man
 * ROM the Space Knight = Proto Man
 * Snake Eyes = Strider Hiryu
 * Cobra Commander = Albert Wesker
 * Megatron = Sigma
 * Starscream = Bass
 * Twilight Sparkle = Tessa
 * Rainbow Dash = Amaterasu
 * Unicron = Pyron

Pretty Cure vs. Capcom
(P.S.: If this game is gonna have Official English Voice Acting, then it would pull a Dragon Ball XenoVerse approach (aka the Promoted Fanboy trope) for the PreCure side as there are many good Pretty Cure (and  Glitter Force) English Fandub Clips on YouTube).
 * Cure Black = Ryu
 * Cure White = Ken
 * Cure Soleil = Chun-Li
 * Cure Scarlet = Morrigan Aensland
 * Cure Miracle = Classic Mega Man
 * Cure Star = Mega Man X
 * Cure Blossom = Zero
 * Cure Grace = Cinnamon (Mega Man X)
 * Cure Melody = Amaterasu
 * Cure Infini = Alex (Street Fighter)
 * Dokurokushe = M. Bison
 * Cure Cosmo = Felicia
 * Ophiuchus = Gill
 * Joker = Albert Wesker
 * Cure Summer = Roll

Guests

 * Usagi Tsukuno/Sailor Moon
 * Sonic the Hedgehog

Go Nagai

 * Akira Fudo/Devilman = Dante
 * TBD = Ryu
 * Honey Kisaragi/Cutie Honey = Chun-Li
 * Devilman Lady = Morrigan Aensland
 * Mazinger Z = Classic Mega Man
 * Aphrodite A = Roll
 * Great Mazinger = Jin Saotome (w/ Blodia)
 * Getter Robo = PTX-40A
 * TBD
 * TBD
 * Ryo Asuka/Satan = Jedah Dohma

Tatsunoko vs. Capcom (for a hypothetical Tatsunoko vs. Capcom Remaster/Sequel)

 * Ryu = Ken the Eagle (Science Ninja Team Gatchaman/Battle of the Planets)
 * Chun-Li = Jun the Swan
 * Alex = TBA
 * Morrigan Aensland = Doronjo
 * Dante = Gawl Kudo
 * Rock Light/Classic Mega Man (w/ Rush) = Go Mifune/Speed Racer
 * Mega Man X = Casshern (w/ Friender)
 * Roll = Yatterman-2 (weapon-wielding female sidekicks)
 * Zero = Joe the Condor (rebel-like heroes)
 * Marino (Mega Man X) = Wataru Toki/Yattodetaman
 * Sigma = Black King (Neo-Human Casshern)
 * Axl = Hurricane Polymar
 * Bass = Rescue Man
 * Felyne = Speedy Cerviche/Yattarou (Samurai Pizza Cats; with Guido Anchovy/Sukashi and Polly Esther/Pururun as assists)
 * Saki Omokane = Tekkaman (members of a defense force)
 * Sir Arthur = Tekkaman Blade (both are knights)
 * Tessa = Komugi Nakahara (Nurse Witch Komugi)
 * Kaijin no Soki = Karas
 * Captain Commando = Ryu Urashiman (Future Police Urashiman)
 * Batsu Ichimonji = Yatterman-1
 * Leon S. Kennedy = Kyosuke Date
 * Viewtiful Joe = Ippatsuman
 * Phoenix Wright = Tamagon
 * Ingrid = Komugi Nakahara
 * Proto Man = Rin Yuki (Muteking: The Dashing Warrior)
 * Frank West = Hakushon Daimao (The Genie Family)
 * Amaterasu (since Yami was the final boss in a original game) = Yoko Misaki and Godam
 * PTX-40A = Gold Lightan
 * Jin Saotome and Blodia = Yuuki Soleil

Disney/Marvel/Lucasfilm/20th Century Studios
For Disney vs. Capcom, check this page.

Avengers vs. Street Fighter

 * Captain America = Ryu
 * Iron Man = Cammy White
 * Hulk = Zangief
 * Red Hulk = Abigail
 * Thor = Blanka
 * Black Widow = C. Viper
 * Hawkeye = Ibuki
 * Shang-Chi = Chun-Li
 * Captain Marvel VII = Ken Masters
 * Punisher = Guile
 * Wolverine = Alex
 * Vision = G
 * Black Panther = Elena
 * Falcon = Ibuki
 * Green Goblin = Q
 * She-Hulk = Rainbow Mika
 * Kingpin = Urien
 * Mr Negative = Necalli
 * Kang the Conqueror = Oro
 * Howard the Duck = Dan Hibiki
 * Ms. Marvel (Kamala Khan) = Dhalsim
 * Spider-Man = Guy
 * Winter Soldier = Charlie Nash
 * Daredevil = Cody
 * Jessica Jones = Lucia Morgan
 * Elektra = Maki
 * Luke Cage = Balrog
 * Nick Fury = Dudley
 * Spider-Man (Miles Morales) = Dee Jay
 * Silk (Cindy Moon) = Juri Han
 * Iron Fist = Makoto
 * Volstagg = Rufus
 * Ghost Rider (Robbie Reyes) = Akira Kazama
 * Loki = Gill
 * Scarlet Witch = Rose
 * America Chavez = El Fuerte
 * Quicksilver = E. Honda
 * Thanos = M. Bison
 * Doctor Strange = Menat
 * Ultron = Seth
 * Omega the Unknown = Kage
 * Knull = Akuma

Guests

 * Cloud Strife
 * Squall "Leon" Leonhart
 * Classic Mega Man
 * Zero

Cartoon Network vs. Capcom

 * Steven Quartz Universe (Appears in his post-Season 5 Appearance) = Ryu
 * Dexter = Tron Bonne
 * Samurai Jack = Dante
 * Spinel = Dhalsim
 * Finn and Jake = Sir Arthur
 * Mordecai = Jin Saotome
 * Marceline = Lord Raptor
 * Blossom (appears in her 1998 series appearance and moveset being based on that with Bubbles and Buttercup as assists and Dynamo for her Level 3 Hyper Combo or Injustice-esque Super Move; albeit older) = Roll
 * Aku = Gill
 * Captain K'nuckles = Zack and Wiki
 * Ben Tennyson (appears in his Alien Force/Ultimate Alliance appearances) = Mega Man X
 * Robotboy = Classic Mega Man
 * Grim (The Grim Adventures of Billy & Mandy) = Maximo
 * Numbah 1 (with others as assists) = TBD
 * Johnny Bravo = Mike Haggar
 * Garnet = Alex (Street Fighter)
 * Jennifer Lee = Chun-Li
 * Pearl = Zero
 * Courage = Amaterasu
 * K.O. (OK K.O.! Let's Be Heroes) = Viewtiful Joe
 * Eddy (with Ed and Edd/Double-D) = Frank West
 * Gumball Watterson (with Darwin as an assist) = Felyne
 * Supercow (Cow & Chicken) = TBD
 * Rex (Generator Rex) = Nathan "Rad" Spencer
 * T.O.M. (Toonami) = Captain Commando
 * Sym-Bionic Titan = PTX-40A
 * Mandark = Albert Wesker
 * Ice King = TBD
 * Mojo Jojo = M. Bison
 * Vilgax = Akuma
 * Father (Codename: Kids Next Door) = TBD
 * HIM = Pyron (final bosses)

Guests

 * Booster Gold (DC Comics)
 * Cassie Cage (Mortal Kombat)
 * Kenshi Takahashi (Mortal Kombat)
 * Bugs Bunny (Looney Tunes)
 * Gwenpool (Marvel Comics)
 * Cloud Strife (Final Fantasy)
 * Tifa Lockhart (Final Fantasy)
 * Sonic the Hedgehog (Sonic the Hedgehog)

DC Universe vs. Capcom

 * Batman = Ryu
 * Superman = Asura
 * Wonder Woman = Chun-Li
 * Aquaman = Ruby Heart
 * Cyborg = Mega Man X
 * Blue Beetle = Classic Mega Man
 * The Flash (Barry Allen) = Viewtiful Joe
 * Green Lantern (Hal Jordan) = TBA
 * Green Arrow = Sir Arthur
 * Raven = Morrigan Aensland
 * John Constantine = Dante
 * Martian Manhunter = Dhalsim
 * Shazam = Gene
 * Firestorm = Edward Falcon
 * Nightwing = Zero
 * Hawkgirl = Michelle Heart
 * Robin (Damian Wayne) = Alastor
 * Booster Gold = Captain Commando
 * TBA = Leon S. Kennedy
 * TBA
 * TBA
 * The Joker = Albert Wesker
 * Catwoman = Jill Valentine (RE5 version like in Ultimate Marvel vs. Capcom 3)
 * Bane = Mike Haggar
 * TBA
 * TBA
 * Atrocitus = Firebrand
 * Swamp-Thing = Amingo
 * Doomsday = Nemesis T-Type
 * TBA
 * Brainiac = Sigma
 * Darkseid = Akuma

Street Fighter vs. Mortal Kombat

 * Ryu = Liu Kang
 * Ken Masters = Kung Lao
 * Guile = Jax Briggs
 * Cammy White = Sonya Blade
 * Chun-Li = Kitana
 * Zangief = Goro
 * Fei Long = Johnny Cage
 * Gouken = Raiden
 * Akuma = Scorpion
 * Geki = Sub-Zero
 * Sakura Kasugano = Li Mei
 * Karin = Cassie Cage
 * E. Honda = Bo' Rai Cho
 * T. Hawk = Nightwolf
 * Juri Han = Mileena
 * Rolento = Kurtis Stryker
 * Blanka = Reptile
 * Dan Hibiki = Mokap
 * Alex = Shujinko
 * Kolin = Frost
 * Oro = Ermac (mysterious red-clad fighters with telekinetic powers)
 * TBA
 * TBA
 * Abel = TBA
 * R. Mika = Sheeva
 * Rashid = Fujin
 * Rose = Ashrah
 * Dhalsim = Quan Chi
 * Gen = Shang Tsung
 * Balrog = Kano
 * Vega = Baraka
 * Sagat = Kintaro
 * M. Bison = Shao Kahn
 * Necalli = Kotal Kahn
 * Oni = Shinnok
 * Seth = Onaga
 * Gill = Blaze