It looks like there's a chance that Tom Cruise could make a cameo appearance in J.J. Abrams' Star Wars: Episode VII. The rumor originated from Mirror.co.uk, who says the actor was recently in London and that he's met with Abrams and several other members of the production staff in regards to appearing in the continuing saga.
I have no idea if there's any truth to this rumor or not, but it's out there. You've got to remember that Cruise gave Abrams his big screen shot with Mission: Impossible III, which basically launched his filmmaking career. If Cruise wants to show make a brief appearance in the film, Abrams might just grant him that.
If it happens, I could see Cruise being a major distraction, but I doubt Abrams will do anything to pull the audience out of the film they're watching. He doesn't seem like the kind of filmmaker that would do that kind of stuff. It will be interesting to see how this develops.