It'll either be Cesaro or Ambrose. They've been pushing Cesaro a little by putting him with Zeb and have him winning matches for a change. Ambrose is one of the most protected guys on the show, he hardly loses, he's great at what he does and a Ziggler or Del Rio/Ambrose feud would be fucking awesome.
As for the Raw MITB. I thought for sure it would be D-Bry, but after how Monday ended with him above the ladder, I'm skeptical, that's not a good sign on the go-home show. Then I saw the Smackdown Spoilers, and Orton ends the show the same way. Maybe RVD, I'm sure Lesnar will screw Punk over, Kane is out, Sheamus isn't over, Christian would be better suited for the WHC. It's all up in the air.
I just hope Cena gets his ass kicked by Mark Henry. Henry has delivered some of the best promos of his career with Cena.