The youngsters are more likely to start headlining WrestleMania once some of the older guys like Undertaker, HBK, HHH, etc. When they retire, lets think about who WWE will have left in the Main Event. Oh yeah Batista and Kane are also retiring shortly. Lets see you have Edge, Randy Orton, Chris Jericho, John Cena, Chrisitan, Jeff and Matt Hardy (If Jeff doesn't leave or get fired for drugs). CM Punk and John Morrison should start headlining WrestleMania. They are both extremely athletic and very talented. Punk and Morrison are both former World Champions. Morrison is a former ECW Champion. Punk is a former ECW Champion, World Heavyweight Champion, and 2 time Mr. Money in the Bank. Punk is also a Triple Crown Champion. Ted DiBiase and Cody Rhodes should be headling by WrestleMania 27. DiBiase and Rhodes are becoming very popular ever since they joined Legacy. With Orton leading them who knows how far those 2 young talented wrestlers can go.