If and that is if they were to go the same route as last year I can only imagine a few matches they would announce a year in advance and that is: Taker/Cena, Punk/Austin, Cena/Austin.Source: Wrestling Observer Newsletter
WWE officials are looking to announce the main event for WrestleMania 29 this year - possibly on the RAW Supershow the night after WrestleMania 28. The belief is that the RAW after WrestleMania 28 will be the highest-rated of the year.
Right now officials are looking at John Cena, The Rock, Steve Austin and The Undertaker as the top guys to build next year around. Regarding Austin, he has not committed to wrestling another match yet.
If they announce Cena/Rock II I will puke in my mouth a little.