Originally Posted by Loki882
We don't know that Erik is a villain this film. Older Magneto seems to be working with Xavier, maybe the younger one is as well (the enemy of my enemy). Lawrence may get billing over both of them (Oscar-winner last year).
By Magneto being villain, I obviously meant Fassbender since he's the topic of discussion right now. And since the DOFP comics has The Brotherhood as the villains in the "Past" it's more than likely the same case for the movie.