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Avengers: Doomsday Update: Waldron Outlines Role Shift as New Doom–Sentinels Rumor Emerges

The Russos now steer a 2026 crossover led by Robert Downey Jr. as Doctor Doom after Marvel’s pivot away from its Kang plans.

Overview

  • Michael Waldron said he moved from lead writer to a supporting role once Anthony and Joe Russo joined with Stephen McFeely overseeing the script.
  • A new unverified claim from insider James Mack alleges Doctor Doom will control X‑universe Sentinels using green magic runes.
  • The same rumor suggests Famke Janssen and Halle Berry could reprise their Fox‑era roles, a possibility not confirmed by Marvel.
  • Recent promotional artwork shown at a China merchandise expo offered fans an early look at the MCU’s Doctor Doom design shared by CinXperience.
  • Marvel positions the film as a large crossover uniting MCU heroes with Fantastic Four and legacy X‑Men characters, with a reported December 18, 2026 theatrical release.