Source: The Wrestling Observer Newsletter
WWE is looking to announce the main event for WrestleMania 29 possibly on the RAW Supershow the night after WrestleMania 28. WWE officials are expecting the RAW after WrestleMania 28 will be the highest-rated of the year.
Right now they are looking at John Cena, The Rock, Steve Austin and The Undertaker as the top guys to build next year around. As far as Austin is concerned, he has not committed to wrestling another match yet but he has been open to a return match if the situation is right.