Bryan somehow gets screwed out of the title match at Wrestlemania. Just before the title match starts Hogan comes out and says he is adding Bryan. HHH grabs the mic and says something like "Hogan, you don't have the authority to do this." Hogan says something like, "True, but he does." Out comes Vince and smiles. Bryan goes on to win the belt and while Bryan is feuding with various challengers the Vince vs. the Authority feud commences.
The main reason I am making such a prediction is that I can't see Vince not making an on air appearance at WM 30. And besides the Rock, it looks like most of the biggest stars in Wrestlemania history will be there. Certainly Vince is one of the biggest stars in Wrestlemania history.