In the post-credits scene of Thunderbolts, the newly established New Avengers are chilling out when they get an alert of an incoming ship. Instead, it was a preview of the upcoming Avengers: Doomsday, a theory seemingly confirmed by the fact that the Russo brothers, Doomsday’s directors, also helmed this post-credits scene. First Steps offers plenty of evidence that Dr. Doom is from 828, including a post-credits scene where he approaches Franklin. Marvel StudiosSo while Avengers: Doomsday will assemble heroes from Earth-616, much of the movie may take place on another Earth. Avengers: Doomsday hits theaters on December 18, 2026.