It's been four years since the Avengers broke up after the Civil War and two years since the Fantastic Four & the X-Men reunited. But during those two years, shape-shifting aliens known as the Skrulls have secretly infiltrated Earth's defenses and kidnapped many of Earth's heroes not only gaining their forms, but also their powers because of a prophecy that they believe in that Earth would be their new home after Galactus consumed their homeworld. The remaining heroes must unite to save the world and figure out where the captive heroes are. Nick Fury comes out of hiding and knew about the invasion. Dr. Doom returns to Earth from his long exile a year ago and also knows about the invasion. Hydra, AIM, & the Brotherhood of Mutants also experience abductions. The captive heroes & villains must put aside their differences and work together if they wish to get back to Earth. (Based on the Marvel comic crossover event of the same name and The Avengers: Earth's Mightiest Heroes Season 2 Episodes 7 & 10-12)
