When was M debuted in X-Men?
X-Men
The X-Men are a team of fictional superheroes appearing in American comic books published by Marvel Comics. Created by writer Stan Lee and artist/co-writer Jack Kirby, the characters first appeared in The X-Men #1 (September 1963). They are among the most recognizable and successful intellectual properties of Marvel Comics, appearing in numerous books, television shows, films, and video games.
X-Men (film)
Fox Broadcasting Company aired a special entitled "Mutant Watch" to promote the movie that partially includes in universe scenes of a senate hearing featuring Senator Robert Kelly. This featurette was included as a bonus feature on some of the video releases. On June 1, 2000, Marvel published a comic book prequel to "X-Men", entitled "X-Men: Beginnings", revealing the backstories of Magneto, Rogue and Wolverine. There was also a comic book adaptation based on the film. A console video game, "", was released on July 6, 2000 to take advantage of the film's release, featuring costumes and other materials from the film.