The site contends the biggest hurdle Fox is trying to clear is what one could call the Agents of S.H.I.E.L.D. dilemma: The studio doesn't want to develop a show with totally original characters for fear of alienating fans, but it also doesn't want to waste potential film characters on a television project.
One character apparently being considered for inclusion is Quicksilver, the scene-stealing speedster from X-Men: Days of Future Past. Actor Evan Peters already has a TV pedigree (American Horror Story), and his character isn't necessarily guaranteed an appearance in 2016's X-Men: Apocalypse.
There are also rumblings that Fox has considered Jamie Madrox (aka Multiple Man) to be the show's leading man/men. Madrox's involvement doesn't necessarily negate Quicksilver's, however; as X-Men fans know, if Fox is talking about Quicksilver and Multiple Man, then executives must be considering Peter David's X-Factor run -- most likely the team's set-up involving a mutant detective agency. Film Divider's inside source confirms this line of thought.
The unnamed source also says a female-led series could be viable, and the site posits that an Anna Paquin Rogue show could work well in prime time. But again, X-Factor could check off all of these boxes with its cast of fan-favorite-yet-lesser-known heroes and assemblage of well-rounded female characters (Polaris, Wolfsbane, Siryn, M, Layla Miller, etc.).
Fox has not commented on the rumors regarding a potential live-action X-Men show.