Marvel Studios has steadily expanded the confirmed roster for Avengers: Doomsday through official announcements, D23 footage in August 2026, and additional scenes in the recent Avengers: Endgame Encore re-release. Key returns include Robert Downey Jr. as Doctor Doom, Chris Evans as Steve Rogers, Chris Hemsworth as Thor, the full Fantastic Four lineup with Pedro Pascal and Vanessa Kirby, multiple X-Men alumni led by Patrick Stewart and Ian McKellen, plus Thunderbolts and newer MCU heroes such as Anthony Mackie, Florence Pugh, and Simu Liu. Late-September updates via Encore footage added Mark Ruffalo’s Hulk and Loki series TVA agents, tightening trader focus on multiversal crossovers ahead of the December 18 release. Remaining uncertainty centers on unconfirmed fan favorites like Tom Holland’s Spider-Man or Hugh Jackman’s Wolverine, where cameo markets remain fluid until final marketing push.
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