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Avengers: Doomsday Update: James Marsden Confirms Cyclops Return as Marvel Tightens Secrecy

Marvel is keeping plot and casting surprises tightly guarded ahead of the Russo-directed crossover’s December 18, 2026 release.

Overview

  • James Marsden publicly confirmed he is reprising Cyclops in Avengers: Doomsday and said the project "feels like something special" as longtime Marvel worlds "are ready to collide."
  • Industry insiders report Marvel intends to keep some cast members unannounced until the film opens, with even fellow X‑Men star Alan Cumming coyly hinting at additional legacy returns; none of these are officially confirmed.
  • New unverified scoops describe Doctor Doom pursuing a "vendetta" across the Multiverse and tease an Avengers vs. X‑Men confrontation, which remain rumors without studio confirmation.
  • Separate reports suggest a potential Scarlet Witch appearance could involve a variant from an X‑Men universe tied to Magneto and Genosha, a concept that is speculative at this stage.
  • Production began in April in London, and some scoopers now claim filming could be wrapping soon, though Marvel has not announced an official wrap date.