Fantastic Four: World's Greatest Heroes
Overview
Upon returning from a mission, the team finds their neighbors in the Baxter Building much more friendly than usual, but it soon becomes clear their "neighbors" are shape-shifting aliens - the Skrulls!
Upon returning from a mission, the team finds their neighbors in the Baxter Building much more friendly than usual, but it soon becomes clear their "neighbors" are shape-shifting aliens - the Skrulls!