While playing host to the Fantastic Four at Avenger Manion, the Avenger find themselves under attack by Doctor Doom's forces.

The world 's most dangerous super villains from the four prisons : after the escape of the dome ( the Vault ) cube ( Cube ) giant room (Big House ) raft ( Raft ) , the greatest on earth six super hero spontaneous free fighting alliance : Avenger Union . The forces of evil , fighting like members include Hank Pym ( giant ants and complex) , Captain America , Hulk , Iron Man , Thor Thor and the bees female , Black Panther and Hawkeye in the development of subsequent episodes will join. When the power of a hero can not save the world , that is, the moment the hero combinations played .