I think Matt Smith should play George McFly. Not only would he be a believeable nerdy misfit, but I also think Mitchel Musso would be a great fit for Marty McFly. I mean, Mitchel Musso is a rebel at heart and a badass. Doc Brown could be played by George Clooney. He'd be a believable scientist. And as for Lorraine, I'm thinking Catherine Zeta-Jones, who is good at serious roles and would be a believable girl who falls for the bad boy types.

Matthew Morrison would be perfect for the Biff role. That's what I think. Two people mentioned Nicholas Cage as Doc Brown, but no, that wouldn't be a good fit. And I disagree with the choice of Shia LeBouf as Biff- it wouldn't be believeable as a big, tough teenager easily beaten by a weaker, street-smart teenager.

Just remember, this is my opinion. I hope they consider my casting suggestions. Because it'd be cool to see these great actors play the roles of George McFly, Marty, Doc, Lorraine, Biff. And Katherine Heigl and Mary Louise Parker would be believable as Lorraine's girlfriends back in the day.