Legion is the mutant son of Professor Charles Xavier and Gabrielle Haller. He takes the role of an antihero and has a severe mental illness, including a form of dissociative identity disorder, with each of his personas controlling one of his many superpowersYep, that sounds like him all right. Legion is a fun character and all, but I can't imagine reality warping powers and split personalities will make for the most accessible show. He's one of those classic X-Men foils where he can do pretty much anything right up to the point where the X-Men discover just the right MacGuffin that allows them to stop him. Your guess is as good as mine as to where this one goes.