ICena Rock II at 'Mania would just annoy me. Best of three at 'Mania, Summerslam then Survivor series is a much better idea. The biggest wrestling show in the world should not have the same main event two years in a row, that's just stupid. Also, this is potentially the last chance to have a Undertaker Cena match, which needs to happen imo. It's the only way I will ever believe that the streak is in danger.
This is why Punk is a perfect opponent for the Rock. It's the chance for the Rock to cement Punk as a permanent main eventer which Jericho is not capable of doing. The feud would be a lot better as well because Punk will take it seriously when he needs to. Cena hasn't done that and it has ruined my enjoyment of the fued in the last few weeks.
Rock/Taker would be quite good as well, I guess.