So I might as well give what I think will be the card for Mania:
WWE Championship Match
The Rock (c) vs. John Cena.
Duh.
World Heavyweight Championship Match
Alberto Del Rio (c) vs. Sheamus vs. Randy Orton
Orton needs to turn heel like, yesterday, so you might as well make him and Sheamus the two top contenders and throw them against Del Rio, who has done a tremendous job with the belt and as a face so far.
The Undertaker vs. CM Punk
This seems to be the way they're going, and as I've said, the promos by Punk should be epic. Oh, he's going to lose. But having him constantly talk down the Undertaker with his pipe bombs (Your name is Mark Calloway! You're married to Michelle McCool!) to talk down his mystique would be epic.
Brock Lesnar vs. HHH
Again, seems to be what they will do, but with Brock now signing up for another two years it adds more questions to the result.
Big Show vs. Ryback
I've heard the Jericho/Ryback rumors, but I just think Jericho/Ziggler is the better match, plus I think that the image of Ryback shellshocking Show is definitely Mania-worthy
Chris Jericho vs. Dolph Ziggler
Because it's going to be awesome, that's why.
Rey Mysterio vs. Sin Cara
Despite the fact that both have fallen off of the map when it comes to a Mania match, you might as well do it for the huge press it will get in Mexico. Plus, hey, there's that mask record, and it will likely be Rey's retirement match.
Six Pack Match to Unify the Intercontinental and US titles:
Antonio Cesaro vs. Wade Barrett vs. Kofi Kingston vs. Bo Dallas vs. The Miz vs. Christian
Gets these guys on the card, and gets rid of one of the dead weight belts.
Tag Team Title Match
Team Hell No vs. Team Rhodes Scholars
There's really not much else they can do with these two teams, so why the hell not.
Some Sort of Divas kerfluffle that may involve a celebrity and makes a good piss break.
So yeah.