Good storyline for Rock vs Cena at mania?

There's only a couple of points that are bad. Otherwise irts okay. First of all, now way ever could the Rock defeat the Undertaker or Triple H. Its a disgrace to them both, especially Taker. I also think that it is best, a Josh said, to have a no-title match. Maybe Cena could fight Christian, lose, then make Christian the undisputed champion. Then the Rock and Cena could battle it out no string attached. If Cena became undisputed champ there would be uproar because he is such an unentertaining, boring, bad, shoved-in-your-face superstar!