The X-Men have been around long enough for several villains to become allies, but the reverse is also true, with many heroes falling to the dark side.

Some of these lesser-known X-Men villains are poised to make a comeback. Unus the Untouchable is a relic of the early days of ...

Ultimate X-Men is a unique take on the X-Men mythos, focusing on a group of Japanese schoolgirls dealing with their mutant ...

Kelsey Grammer’s surprise return as Beast in The Marvels post-credits scene left many scratching their heads. His sudden reappearance as Dr. Hank McCoy, blue and shaggy, welcoming Monica Rambeau to a ...