Ok, my options are as follows, no order in particular:
-Randy Orton: the most logical one(?) I think he is going to have a short-medium reign and lose the title with Triple H.
-Triple H: A little too early for Triple H, but still, he is Triple H

so he can do whatever he wants.

He would beat umaga and then some sort of Battle royal when he gets the belt.
-Mr Kennedy: Don't discard this guy. He could be returning from a suspension, but he could win the lottery if they (creative) decide to do the WM program with Kennedy as champ. Too soon I know, kind of a long shot, but still probable.
-Undertaker: Loooooooong shot here, but don't discard him also. He could be the "hint" trowed as the one star NOT in the RAW roster... This IMO would be AWESOME! but frankly, highly unlikely.
-John Morrison: Yep, you read right: John Fucking Morrison. And I don't know why people would be surprised with this option, he been doing some great work at ECW. I know it's a long shot, but i see this more probably than Undertaker catching the belt. Morrison could start a feud with Kennedy, or even with a returning Jericho.
All in all, it will be cool to see a new guy in charge, no matter if it's for a couple of months.