He's the most likely to win IMO. I can't see any of the other guys taking it. Swagger and Caesro have just formed a duo, Fandango is just there to make up the numbers in the match, and the same is probably true of Rhodes Scholars and Wade Barrett. This really is the filler MITB match it seems and Ambrose getting a hold of the briefcase at least adds to The Shield's gimmick of wanting all the gold, only this time, Ambrose going for the world title could cause tension between he and Reigns/Rollins. It also adds a bit to the Christian/Ambrose US Title feud heading into Summerslam, as Ambrose can brag about winning his MITB match while mocking Christian for losing his. (IF he loses the US Title to Christian, which I doubt, Ambrose can say he can have the US Title, but he can never take *this* (referring to the briefcase for the WHC that he holds up.)