The X-Men are a superhero team in American comic books published by Marvel Comics. Created by writer/editor Stan Lee and artist/co-plotter Jack Kirby, the team first appeared in The X-Men #1. From Wikipedia
Marvel president Kevin Feige revealed at CineEurope that The Fantastic Four: First Steps will premiere July 25 with events extending directly into Avengers: Doomsday, which is filming in London for a December 2026 release.