First off, if they're going to replace Kane in the match, and he's healthy, Rey Mysterio should be the guy. I would have originally said Jericho, but I think he's going to be carted away on a stretcher after his match with Ryback. But going to six, in my opinion, is just fine, but why take out Kane if they don't have the plan to add someone else? Unless Kane is hurt, of course.
The issue thus is the winner of the match. Christian, God bless him, is not that man. He had his short run on top, hasnt shown himself to be reliable physically since, and has been jobbed out to the other All-Stars pretty convincingly since the match was announced. Of course, Vince sometimes loves to break people down before a gigantic push(see Daniel Bryan in 2011), but he's not that man. He's a steady hand and goodness knows a great ladder match competitor, but he's a mid-carder now and headed for a feud with Dean Ambrose, it appears, for the U.S. Title.
Scratch C.M. Punk as well. He's headed to a match with Brock Lesnar at Summerslam, and I see this match as a way of building towards it. Despite Punk's instructions, I could see Heyman coming out to "encourage him", but "accidentally" costing him the match when Punk tries to shoo him away.
I can't see Sheamus winning this either. Again, a guy who could have been brought down to build up, but I don't think his character is in a position right now, or possibly ever, to be that guy. He's a good wrestler, but he's too one-dimensional a character to really be a main event guy. He's done nothing for so long for good reason, he's just not that interesting.
RVD will come back, get a pop that's off the charts, will do some crazy high spots, but he won't win. He's on a part-time schedule, and while that didn't stop The Rock from winning the WWE Championship, RVD isn't the Rock. Besides, part of the briefcase is the ability to cash in at any time, which will be difficult to happen if he's not at the show. I'm looking forward to his return, but as his age, he shouldn't be winning championships, he should be putting over younger stars. And somewhere, I'm sure it's in the back of Vince's mind that he handed him the keys to the car once back in 2006, and RVD screwed himself and Vince over.
That leaves Bryan and Orton, who not only have been feuding, but have been the men left standing at the end of Raw and Smackdown respectively. They're the favorites, in my opinion, with Bryan having the edge. He's been built up so well and perfectly booked, and received, as a growing star that him losing would almost derail that. Of course, he could then win a #1 Contender's match for Summerslam, Orton could cash-in following a Bryan victory, and they could renew their feud anew, but I'm going with Bryan. Although Orton has seemingly stayed out of trouble and has earned enough trust to be main-eventing Raw's and Smackdown's, but he's just not at the level Daniel Bryan is.
No one in this match is. And in order to capitalize on a guy who has incredible momentum and a phenomenal connection with the fans, it should and I think it will be Daniel Bryan.