Multiple X-Men movies have been released so far, but Avengers: Doomsday will do something with the Mutants that we've rarely seen on the big screen before.

The villain’s extremely brief, dialogue-free cameo is a clear nod toward next year’s “Avengers: Doomsday,” which will pit the Fantastic Four, Avengers, New Avengers, Wakandans and the X-Men of the 2000s against Downey Jr.

As promised last year by Disney CEO Bob Iger, Marvel Studios has scaled back to only 2-3 feature film releases each year, and with "The Fantastic Four: First Steps" in theaters, that's it for the 2025 lineup.