Source: The Wrestling Observer Newsletter
As of right now, the top four WrestleMania 29 matches are below. Most of these have been previously reported in the last few days, though the last of them is a newly-reported one:
* The Rock vs. John Cena (WWE Title Match??)
* CM Punk vs. The Undertaker (WWE Title Match??)
* Ryback vs. The Big Show
* Sheamus vs. Randy Orton (heel)
Where Brock Lesnar fits in is yet to be seen, though there is still the possibility of a rematch with Triple H.
PLEASE keep in mind that WWE creative plans change on a week to week basis and NOTHING is confirmed as of this writing.