Overview
- Reports on June 16, 2026 show Marvel confirmed returns by several Fox‑era X‑Men actors and that Robert Downey Jr. will appear as Doctor Doom in Avengers: Doomsday.
- New promotional art and Marvel Legends figures consistently depict Kelsey Grammer’s Beast without a shirt, wearing the glasses seen in The Marvels and an X‑Men belt, but Marvel has not officially confirmed the on‑screen costume.
- Attendees at a private CinemaCon presentation described footage of Professor Xavier at the X‑Mansion watching a bright flash approach, a sequence that attendees say implies a multiversal incursion bringing the X‑Men into the story.
- Early attendee descriptions also mention specific set pieces, including Gambit facing Shang‑Chi and Mystique using shape‑shifting against Yelena Belova, though those reports are limited and have not been released by Marvel on camera.
- The move follows Disney’s reunification of X‑Men rights and Marvel’s gradual mutant rollout beginning with Beast’s post‑credits appearance in The Marvels, and it signals that official confirmations of designs and footage will be the next items to watch before the December 18, 2026 release.