Source: The Wrestling Observer
The Rock is not one of the people expected to face Brock Lesnar at WrestleMania 32, because he’s reportedly set for a match with Triple H.
The plan in WWE was to have Rock vs HHH and Ronda Rousey vs Stephanie McMahon, or possibly a mixed tag with all four, after Rousey’s appearance at WrestleMania 31. If the UFC wouldn’t let Rousey wrestle, then she would be in the corner of The Rock while Stephanie is in HHH’s corner. Rousey will now not be involved at WrestleMania 32 because she’s committed to a film role.
The plan, as of now, is still The Rock vs. Triple H.