I think HBK will win this Rumble, he hasn't done too much as of late as in title matches, he could go to the main event and have a triple threat with Cena and Orton or even throw a newly heel turned HHH in there, could be alright, would have some good promos and whatnot and the match would be good, unless of course HBK is retiring at this mania then he would most likely have a singles match with someone.
I would say Edge is winning if I knew he was going to be back around Rumble time, everybody saying they heard he may be out longer has probably read something which will make it look less obvious that Edge will return and win.
I would also like Christian to win but he would be my LONG SHOT, a very long shot, it would be good but its extremely doubtful, out of the heels the only one I can really see winning atm is CM Punk, although it would be the perfect chance to get Jericho away from Big Show and back up to the top.