A.J. LoCasio's virtuoso Marty McFly has anchored Telltale Games' Back to the Future through its first four episodes, and will do so again in the fifth. That doesn't mean there's no room for the character's original actor.
Michael J. Fox is featured in the series' conclusion, "Outatime," due for the PC and Mac on June 23. Mum's the word on who his character is, but it's probably a good guess from this video he's one of McFly's ancestors.