The Avengers try to stop A.I.M. from stealing high-tech weapons from the future ever since it was discovered that they upgraded the gear of Whiplash and Spymaster. Their fight with A.I.M. attracts the attention of the 30th-century warlord Kang the Conqueror since it was his technology that A.I.M. used as he takes control of the A.I.M. Agents present.
"Marvel's Avengers Assemble" reunites the most popular super hero team - Iron Man, Hulk, Captain America, Thor, Hawkeye and Black Widow, along with newcomer Falcon, marking the first time in animation history this distinct team of heroes will join forces.
Led by Iron Man, the heroes train and live together in their new headquarters in Avengers Tower. The planet's most dangerous villains don't stand a chance when the Avengers assemble - whether they are stopping Dr. Doom from conquering Asgard, Attuma driving the Atlantean Army into New York City or Dracula unleashing vampire hordes, the Avengers must work together to succeed.