If Cena gets injured its bad, but what if Cena and The Rock both get injured what would Mcmahon do? Don't tell me Rock is only wrestling now, he probably has movies to do so he is more likely to get injured than Cena. If both of them are out and it happens right before wrestlemania, call CNN quick because Vince will have a gun to his head and will shoot himself Ben laden style. Why in the hell did they book that match 1year in advance is beyond me, there is so much that can happen between now and next wrestlemania that i would think Vince wouldn't be crazy enough to book a match i year in advance. But hey he gave Cena his title back and is willing to have him defend the belt for 1 year, so i guess Vince is crazier than we thought.
I back the decision to book a year early. It only adds to the anticipation fgor the biggest match fo recent times. Hey if you book a match 4/5 weeks early there is always a chance of injury! Obviously more chance given a year, but also more time to rebook. I am pretty sure WWE will have a back up plan in place. I see them wrapping Cena in cotton wool anywhere from the Rumble onwards.
Maybe WWE might do an 'injury angle' in order to keep Cena fresh for the big match so he doesnt have to perform in the ring. Get people talking to...'will be make it'.