Marvel Dawn/Avengers Assemble!

Avengers Assemble! is a comic book published by Marvel Comics under their Marvel Dawn initiative. As the name implies, the series is Marvel Dawn's Avengers ongoing series, following an ever-changing roster of superheroes that defend the planet.

Synopsis
The series follows a group of superheroes known as the Avengers, also referred to as "Earth's Mightiest Heroes", who defend the planet against any threat that faces it, ranging from alien invaders, to magical beasts, to people hellbent on world domination.

Current Roster

 * Steven "Steve" Rogers/Captain America - the fearless leader of the Avengers who is a former soldier from World War II that was frozen in ice and thawed out in modern day. Steve has a formula known as the Super-Soldier Serum pumping through his blood, granting him many incredibly abilities. He also wields a round shield that he can throw as a weapon.
 * Anthony "Tony" Stark/Iron Man - the co-leader and second-in-command of the Avengers as well as their benefactor who is the CEO of Stark Industries. Tony is somewhat egotistical and is kept alive by an artificial heart known as the Arc Reactor. He is also a genius inventor that is constantly creating devices known as the Iron Man Armors.
 * Bruce Banner/The Hulk - a genius scientist who was accidentally bombarded with Gamma Radiation, giving him an immensely powerful split-personality known as the Hulk which is so dangerous that both Bruce and Hulk are being hunted by the government. While the Hulk is seen as a monster, he's mostly misunderstood and simply wants to be left alone.
 * Thor Odinson - the son of All-Father Odin, ruler of Asgard, and the god of thunder and lightning who has a very old-fashioned way of talking and is one of very few people who can wield the hammer Mjolnir, which is one of the most dangerous weapons in the universe. Thor is incredibly joyful and loves battling alongside his friends.
 * Henry "Hank" Pym/Ant-Man - one of the smartest men alive whose science borders on magic. Hank is constantly looking for a way to make the world better, whether by redeeming villains or fighting threats himself. He is also the inventor of the Pym Particles, which allow Hank to shrink and grow at will, and wears a helmet that lets him communicate with ants.
 * Janet Van Dyne/Wasp - Hank's girlfriend and lab partner who genuinely loves being a superhero and will take any chance she can get to do hero work and her outgoing and talkative personality contrasts Hank's quiet one perfectly. Like Hank, she has access to Pym Particles, though they only let her shrink, and wears a pair of bio-synthetic wings as well a glove that fire concussive blasts.

Former Members

 * TBD

Supporting

 * S.H.I.E.L.D., consisting of:
 * Nicholas "Nick" Fury, Jr. - the director of the government group S.H.I.E.L.D. and one of the people who helped assemble the Avengers. Nick is a man with a strong sense of justice and will do anything in his power to help Earth, even if it means he'll have to make enemies with a lot of people.
 * Maria Hill - the second-in-command of S.H.I.E.L.D. who is a far more stern and morally grey person than Fury, though she believes in Fury's ideologies more than even Fury himself. Maria is a very polarizing figure and most of the Avengers have a complicated relationship with her.
 * Sharon Carter/Agent 13 - the grandniece of Captain America's former lover, Peggy, who took over her grandaunt's title as Agent 13 for S.H.I.E.L.D. She is an impeccably skilled fighter, able to keep up with the very best, and is somewhat snarky but gets very serious when she needs to.
 * Natasha Romanoff/Black Widow - a member of the Russian branch of the terrorist group Hydra who was experimented on and trained by them to be a killing machine. She was originally sent to infiltrate and spy on S.H.I.E.L.D. but later defected to their side after being shown the atrocities her group had committed.
 * Clinton "Clint" Barton/Hawkeye - a former member of the infamous Circus of Crime who was paraded as "the man who never misses" and wielded a bow and arrow. Later on, Hawkeye ran away from home after a blow-out with his adoptive family and joined S.H.I.E.L.D. as a way of redeeming himself for his past actions.
 * Clay Quartermain - an egotistical S.H.I.E.L.D. agent that enjoys bragging and making quips. Luckily, he is very much able to back his ego up and is one of S.H.I.E.L.D.'s most trusted agents. He is often sent on some of their biggest missions and is a close personal friend of Nick Fury.
 * Agents of Atlas, consisting of:
 * James "Jimmy" Woo - the leader of the S.H.I.E.L.D. branch, Agents of Atlas, who is an incredibly intelligent Asian-American spy that has been trusted to deal with and apprehend supervillain threats all across the world. He is very serious with his team and is an incredibly good leader but enjoys getting on his enemies' nerves.
 * M-11/The Human Robot - a large, powerful robot that was originally designed to be a killing machine but managed to become self-aware. Unfortunately, since then it has been somewhat unaware of its place in the world, though it currently believes its purpose to be helping people thanks to Jimmy Woo.
 * Robert "Bob" Grayson/Uranian - a human raised by aliens known as the Uranians whose genes were mutated to give him incredible powers. Eventually, he was sent by the Uranians back to Earth to teach them the ways of the Uranians and to be their ambassador. However, due to his years on another planet, Robert has some trouble relating to his own people.
 * Kenneth Hale/Gorilla-Man - TBD
 * Venus - TBD
 * Aquaria Neptunia/Namora - TBD
 * Howling Commandos, consisting of:
 * Timothy "Dum Dum" Dugan - the leader of the S.H.I.E.L.D. group, the Howling Commandos. Dugan is somewhat slow-witted but makes up for it with his incredible courage and willingness to put himself on the line for others. He, along with the other Commandos, has been assigned to deal with supernatural and magical threats.
 * The Creature/Frank - TBD
 * Dr. Theodore Sallis/Man-Thing - TBD
 * Vic Marcus/Warwolf - TBD
 * N'Kantu/The Living Mummy - TBD
 * Margaret "Peggy" Carter - TBD
 * James "Bucky" Barnes/Winter Soldier - Captain America's former side-kick from World War II who was supposedly killed in the accident that froze Cap. However, Bucky lived and was kidnapped by
 * Virginia "Pepper" Potts - TBD
 * Harold "Happy" Hogan - TBD
 * James "Rhodey" Rhodes/War Machine - TBD
 * Edwin Jarvis - TBD
 * Elizabeth "Betty" Ross - TBD
 * Richard "Rick" Jones - TBD
 * Gen. Thaddeus "Thunderbolt" Ross/Red Hulk - TBD
 * Col. Glenn Talbot - TBD
 * Odin Borson - TBD
 * Freyja Freyrdottir - TBD
 * Lady Sif - TBD
 * Balder Odinson - TBD
 * Warriors Three, consisting of:
 * Volstagg the Voluminous - TBD
 * Fendral the Dashing - TBD
 * Hogun the Grim - TBD
 * Jane Foster - TBD

Antagonists

 * Hydra, consisting of:
 * Johann Schmidt/Red Skull - a former Nazi commander in World War II who went on to form his own branch known as Hydra. He was presumed dead for many years but was later revealed to be alive thanks to alien technology. His two goals in life are to conquer the world and to find the mythical and all-powerful Cosmic Cube.
 * Baron Wolfgang von Strucker - one of the Red Skull's main rivals and another infamous Nazi soldier. Strucker is a major enemy of S.H.I.E.L.D. and Nick Fury in particular, having many run-ins with him over the years. He is also the wielder of the Satan Claw, which grants him incredible strength, energy warping abilities, as well as immortality.
 * Ophelia Sarkissian/Madame Hydra - the commander and trainer of Hydra's soldiers who is an incredibly scary and sadistic woman that is loyal to Hydra above everything else. She is also the lead advisor of the heads of Hydra and is their most trusted assassin. She has a habit of using poison and venom in her kills, earning her the nickname "The Viper".
 * The Hive - a living mass of parasites possessing a human host who speaks in a made-up language that can only be understood by other Hydra agents. The Hive was created to be the living embodiment of what Hydra is, making him quite possibly their most dangerous member.
 * Jacob "Jake" Fury/Kraken - Nick Fury's brother who constantly lived in Nick's shadow and grew spiteful and resentful towards him, which would eventually lead to the two becoming bitter enemies. Jake is considered S.H.I.E.L.D.'s most wanted man and is one of the most dangerous and creative terrorists in history.
 * Johann Fennhoff/Doctor Faustus - a sociopathic psychic who is the self-proclaimed "master of men's minds". Faustus is power-hungry and is willing to do anything to crawl up the criminal ladder. He is unique amongst villains, as he prefers to use his psychic powers to turn his enemies against each other and draw out negative emotions to force them to kill themselves.
 * Sinthea Schmidt/Sin - TBD
 * Dr. Arnim Zola - TBD
 * Tony Masters/Taskmaster - an operative of Hydra with the ability to study and copy anyone's fighting style, making him an extremely dangerous warrior.
 * Brock Rumblow/Crossbones - TBD
 * Eric Williams/Grim Reaper - the older brother of Simon Williams aka Wonder Man who joined Hydra and has mechanically augmented himself to have a scythe for a hand.
 * Ultron - TBD
 * Loki Leufeyson - TBD
 * Thanos - TBD
 * Advanced Idea Mechanics, consisting of:
 * George Tarleton/M.O.D.O.K - TBD
 * Scientist Supreme - TBD
 * Monica Rappaccini - TBD
 * Super-Adaptoid - TBD
 * Paul Robert Ebersol/The Fixer - TBD
 * Franklin Hall/Graviton - a former S.H.I.E.L.D. scientist who got imprisoned for his insane desire to manipulate gravity as A.I.M. ended up hiring him to work for them.
 * Marvin Flumm/Mentallo - TBD
 * Deidre Wentworth/Superia - TBD
 * Doomsday Man - TBD
 * The Masters, consisting of:
 * Baron Heinrich Zemo - TBD
 * Amora/The Enchantress - TBD
 * Skurge/The Executioner - TBD
 * Ivan Vanko/Crimson Dynamo - TBD
 * Emil Blonsky/Abomination - TBD
 * Simon Williams/Wonder Man - TBD

Issues

 * 1) The Living Legend - In the year 1944, Captain America and his sidekick Bucky go on what is quite possibly their last mission against the infamous Nazi commander, the Red Skull. At the end of the story, Cap is found frozen in ice and unthawed by S.H.I.E.L.D.
 * 2) Iron, Forged In Steel - After Captain America goes into denial about his new surroundings and goes missing looking for Bucky, S.H.I.E.L.D. decides to hire Tony Stark, AKA Iron Man, to either bring him back to reality or capture him.
 * 3) Tales to Astonish - Hank Pym and his girlfriend, Janet, return to America after studying in the island nation Wakanda in order to take samples of Cap's blood and replicate the Super-Soldier Serum. However, Hank begins questioning this choice after a conversation with Cap.
 * 4) Thunder and Lightning - In the realm of Asgard, Thor Odinson is ready to be crowned the official protector of the Nine Realms by his father, Odin. However, before he can, Thor's evil foster brother, Loki, attacks with a small army of Frost Giants.
 * 5) Man Or Monster - After discovering that Bruce Banner, AKA, The Hulk's location, Thaddeus "Thunderbolt" Ross hires Nick Fury to help him capture Banner. Meanwhile, Tony Stark has to deal with the now powerless Thor, who has crash landed on Earth after an argument with his father.
 * 6) Assault on The Cube - When Bruce Banner's prison, The Cube, is attacked by a group of people in black armor led by a man known as "The Other", S.H.I.E.L.D. send their agents in to stop the raid. Meanwhile, Tony helps Thor by giving him a job and creating the persona "Donald Blake" for him. Steve also continues adjusting to modern day, deciding to see if any of his WWII friends are still alive.
 * 7) The Return of Captain America - After a talk with his former girlfriend, Peggy, Steve has decided to continue as Captain America in the modern day. This couldn't have come at a better time, as countless S.H.I.E.L.D. bases and prisons have been raided and their top scientists (such as Hank Pym) have been kidnapped by The Other and his armored men. Meanwhile, Thor meets and hits it off with the mortal woman, Jane Foster.
 * 8) Ultimate Alliance - Captain America, Iron Man, and the newly freed Hank Pym and Janet Van Dyne (dubbed "Ant-Man and The Wasp" by Tony) decide to work together to find a way of defeating The Other and his armored men, who have been revealed to be aliens known as Chitauri and are working on a super-weapon. Meanwhile, Bruce Banner has a talk in his head with the Hulk, attempting to convince him to join the fight.
 * 9) /Invasion!/ - It's too late as The Other, who has been revealed to be, in fact, Red Skull has created his super-weapon, known as the Cosmic Cube and uses it to open a portal to the Chitauri home world, summoning an army of aliens to his side. Now it's up to the heroes to try and send the aliens back before Red Skull conquers the world.
 * 10) /War on Earth/ - While the portal has been successfully closed, the heroes are still forced to battle the remaining Chitauri invaders as well as Red Skull, who has teamed-up with the Chitauri leader, known as Warbringer, to invade the White House and declare himself the ruler of the United States. Luckily for the heroes, they now have a Hulk.
 * 11) The Sleeper Awoken - With the assistance of The Hulk, the heroes have managed to defeat most of the Chitauri. However, in one last ditch-effort to turn the battle to his favor, Red Skull has awoken the Chitauri robot known as The Sleeper, which has been slowly absorbing Earth's energy since the 1940s. Meanwhile, Thor attempts to protect Jane and the rest of the hospital from what's left of the Chitauri as well as The Sleeper.
 * 12) /Aftermath/ - In the aftermath of the Chitauri Invasion, the heroes decide to stick together for a bit to round up what's left of the Chitauri on Earth as well as try and look for Red Skull, who has gone missing. However, all of the heroes (now including the once again worthy Thor) are hounded by reporters and forced to consider what they'll all be doing next.

Arcs

 * Assembled (1-12)