Sheamus is an obvious one. I'm personally hoping that the rumors of Hulk Hogan making an appearance in the Rumble are true. He would be the ultimate surprise entrant for a Rumble match, and no telling what the pop would be when the "Real American" theme hit the arena. Unfortunately, the rumors of that happening would be running more and more rampant the closer we get to the event and there'd probably be a certain section of fans chanting Hogan's name every time the clock was counting down to a new entrant (thus running the surprise for the other people in the arena), but oh well.