Marvel has announced the return of some Marvel Cinematic Universe (MCU) stars in 2026's "Avengers: Doomsday," including Chris Hemsworth as Thor, Anthony Mackie as Captain America, Sebastian Stan as Bucky Barnes and Tom Hiddleston as Loki.

Marvel Studios spoiled Thunderbolts* by revealing most of the team will be in Avengers: Doomsday. Fans speculate Taskmaster won't survive Thunderbolts* based on trailer evidence. The decision to reveal cast members for Avengers: Doomsday could harm Thunderbolts* box office results.

When the Marvel Cinematic Universe released its first tentpole film The Avengers in 2012, its success (grossing $1.5 million worldwide) set off a phase of superhero mania — where the least connected of films could get people to fill seats at the mere hint of a new casting or surprise cameo.