Terrible, I can't believe I saying this but I much rather have the belt on Cena then The Rock. The Champion going missing for a weeks then suddenly appearing is a pet peeve of mine.
I just think having Rock win this match would do much more than a Cena win. If Cena wins, he'll hold the title until next Wrestlemania and then have a tiebreaker match with The Rock. I guarantee it. They won't allow the score to be even between the two. If Rock wins, Cena goes into a serious tailspin, completely revamps his character, hopefully becomes a heel and we have something interesting. If that were to happen, maybe The Rock could just step down as champ and say that he has other full-time commitments and, while it's been fun, he is unfit to be champion. Or they could just have somebody beat him at Extreme Rules. Maybe CM Punk?