It was originally believed that Lesnar and Triple H would have a rematch this fall, likely at Survivor Series in November. F4Wonline then reported that the working plan was for the rematch to take place at WrestleMania 29.
Lesnar currently only has a dozen or so appearances remaining on his current deal, and there is talk of keeping him off of television until early next year for WrestleMania season. According to a source, no final decision has been made in regards to if Lesnar will face Undertaker or Triple H at WrestleMania, and there are strong arguments for each. A match against the Rock at the event, which has been rumored in the past, seems unlikely at this point.
The final decision may depend on if Lesnar signs a new contract. The belief is that he would renew his current contract, however it remains to be seen if WWE would want to offer him such a lucrative deal again.