We already knew that the upcoming Lego Dimensions video game would be a universe-bending mashup of characters from franchises including Back to the Future, Jurassic World, Ghostbusters, Lord of the Rings and, of course, The Lego Movie. Today, we found out a lot more about the voice actors behind the game, and it's a veritable treasure trove of big-name actors and some of the best video game voice talent you can find. Perhaps most notably, both Michael J. Fox and Christopher Lloyd will reprise their roles as Marty McFly and Doc Brown. It's no surprise Lloyd is involved -- he voiced Doc in Telltale Games' Back to the Future series a few years ago and was featured in advertisements for Lego Dimensions. But Fox hasn't performed as McFly in any official capacity in years.