In an interview with IGN, Lauren Shuler Donner took time to speak about Legion and was asked how Professor Xavier would play a role in the show. As readers know, the wise telepath fathered David with Gabrielle Haller, but Donner is warning fans that Legion won’t dive into that mystery quite yet.
“We just don't want to get into the Xavier world, because that's not what this show is about,” she explained.
“Probably the driving mystery is, yes, who is David? But not in that sense. It's more, "Is David schizophrenic? Is he crazy? Or does he have powers?" That is the mystery. "Who is David?””
When asked whether the decision to avoid Professor Xavier was an intentional one, Donner said it was. However, the producer promised the show touches on the topic here and there.