I knew that the Marvel Studios display at Disney’s D23 convention in Anaheim, California would be memorable, but I didn’t expect Marvel to surprise us with a first look at some of their upcoming X-Men costumes. After — MAJOR SPOILER ALERT!! — Sadie Sink ‘s Jean Gray showed up in Spider-Man: Brand New Day and we saw all our favorite OG X-Men in the Avengers: Doomsday trailer , we knew the upcoming movie (out December 18, 2026) would see the return of a lot of old favorites.