Kingdom Hearts: Two-Light Climax

Kingdom Hearts IV is an upcoming action/role-playing game developed and published by Square Enix for the PlayStation 5. It is the fifteenth installment of the Kingdom Hearts series. Its release date is probably 2022 or 2023. This is the first game to use worlds based on Disney shows, including worlds based off of Disney films under the Marvel, LucasFilm, and Fox banners.

Story
The game takes place after Kingdom Hearts III and its DLC expansion Re:Mind. When Xigbar (also known as Luxu) teams up with the Foretellers to start another epic Keyblade War, Sora (or Yozora in Verum Rex) must escape this world and reunite with Donald, Goofy, King Mickey, and the Guardians of Light, travel to more worlds, and call the war off.

Worlds and Characters
* =worlds you can't travel to, +=worlds you can travel to but not on the world map, #=party members

(the worlds are not in order)

Verum Rex

 * Sora#
 * Donald#
 * Goofy#
 * Yozora#

Disney Castle*

 * King Mickey#
 * Queen Minnie
 * Daisy
 * Pluto
 * Chip and Dale
 * Jiminy Cricket

Destiny Islands*

 * Riku#
 * Kairi#

Land of Departure*

 * Aqua#
 * Ventus#
 * Terra#

Mysterious Tower*

 * Yen Sid

Twilight Town

 * Roxas#
 * Lea#
 * Xion#
 * Isa#
 * Hayner
 * Pence
 * Olette
 * Namine
 * Aerith
 * Leon
 * Yuffie
 * Cid
 * Scrooge McDuck
 * Remy (previously named Little Chef in 3)
 * Merlin

Toy Box (Toy Story)

 * Woody#
 * Buzz Lightyear#
 * Hamm
 * Rex
 * Green Army Men
 * Little Green Men
 * Bo Peep
 * Lenny
 * Andy Davies

Arendelle (Frozen II)

 * Elsa
 * Anna
 * Kristoff
 * Olaf
 * Sven
 * Marshmallow#

Bayou of Wishes (The Princess and the Frog)

 * Tiana#
 * Prince Ravine#
 * Louis
 * Ray
 * Mama Odie
 * Dr. Fallicer

The Savannah (Zootopia)

 * Judy Hopps#
 * Nick Wilde#
 * Chief Bogo
 * Officer Clawhauser
 * Mayor Lionheart
 * Bellwether

Metroville (The Incredibles)

 * Mr. Incredible#
 * Elastigirl#
 * Violet#
 * Dash#
 * Jack-Jack
 * Frozone#
 * Edna Mode
 * Rick Dicker
 * Syndrome

Marvel Universe (The Avengers)

 * Iron Man#
 * Captain America#
 * Hulk#
 * Thor#
 * Hawkeye#
 * Black Widow#
 * Nick Fury
 * Phil Coulson
 * Pepper Potts
 * Loki
 * Chitauri

100 Acre Wood+ (Winnie the Pooh)

 * Pooh Bear
 * Piglet
 * Rabbit
 * Tigger
 * Eeyore
 * Roo
 * Gopher
 * Owl
 * Lumpy
 * Kanga

Medfield College (The Computer Wore Tennis Shoes)

 * Dexter Riley (as a computer)#
 * Mr. Higgins
 * A.J. Arno

Woo Foo Town (Yin Yang Yo!)

 * Yang#
 * Yin#
 * Master Yo
 * Dave
 * Lina
 * Roger Jr.
 * Night Master
 * Carl
 * Coop
 * Flaviour
 * Night Master Army

Shuggazoom City (Super Robot Monkey Team Hyperforce Go!)

 * Chiro#
 * Antauri#
 * Nova
 * Gibson
 * Sprx-77/Sparx
 * Otto
 * Jinmay
 * Skeleton King
 * Mandarin
 * Sokko
 * Boneless Minions

Distant Galaxy (Star Wars Episode IV: A New Hope)

 * Luke Skywalker#
 * Han Solo#
 * Princess Leia
 * Obi-Wan Kenobi
 * R2-D2
 * C-3PO
 * Chewbacca
 * Darth Vader
 * Stormtroopers

Jetix City (Jetix)

 * Jay#
 * Kim Possible#
 * Jake Long#
 * Will#
 * The Ninja#
 * Star Butterfly#

The Final World*

 * Chirithy

Keyblade Graveyard

 * Xigbar/Luxu
 * Maleficent
 * Pete
 * Magica De Spell
 * Beagle Boys

Scala de Caelum/Daybreak Town*

 * Master of Masters
 * Foreteller Aced
 * Foreteller Gula
 * Foreteller Invi
 * Foreteller Ira
 * Foreteller Ava

Roadkill County (Gravity Falls)

 * Dipper Pines#
 * Mabel Pines#
 * Grunkle Stan
 * Soos
 * Wendy
 * Gideon

Wizville (The Proud Family)

 * Penny Proud
 * Oscar Proud
 * Suga Mama
 * Trudy Proud
 * BeBe and CeCe
 * Puff
 * Dijonay
 * Zoey
 * Felix Boulevardez
 * Lacienega Boulevardez
 * Bobby Proud
 * Wizard Kelly
 * The Gross Sisters

Springfield (The Simpsons)

 * Homer Simpson
 * Bart Simpson
 * Marge Simpson
 * Lisa Simpson
 * Maggie Simpson
 * Ned Flanders
 * Krusty the Clown
 * Milhouse
 * Principal Skinner
 * Mr. Burns
 * Smithers
 * Sideshow Bob

Muppet Theater (Muppets)

 * Kermit the Frog
 * Gonzo
 * Miss Piggy
 * Fozzy Bear
 * Dr. Teeth
 * Floyd Pepper
 * Janice
 * Animal
 * Rizzo the Rat
 * Bunsen Honeydew
 * Beaker
 * Rowlf
 * Statler and Waldorf
 * Scooter
 * The Swedish Chef

Radiator Springs (Cars)

 * Lightning McQueen
 * Mater
 * Sally Carrera
 * Doc Hudson
 * Sheriff
 * Chick Hicks

St. Canard (Darkwing Duck)

 * Darkwing Duck#
 * Launchpad McQuack
 * Gosalyn
 * Negaduck
 * Megavolt
 * Quackerjack
 * Liquidator
 * Bushroot

Gameplay

 * The Command Menu, Shotlock Gauge, Attraction Flow, Keyblade Formchanges, ability to run up on walls, Flowmotion, Bistro mini-games (with vast improvements), and team attacks will return (as well as Reaction Commands after being absent at 3.)
 * New features include:
 * Universal Tablet (which can instantly teleport you to other worlds not on the World Map, where you can help characters on mini-games and quests; you'll unlock more side-quests as the game progresses. You will get the Tablet from your first visit at Jetix City.)
 * You can, for the first time ever, invite other Disney characters you previously partnered with, to fight alongside you in other worlds. You can level them up in other worlds (mostly during grinding.)
 * Summon characters can be leveled up too. The higher the level, the stronger their attacks/abilities get.