It's a good start. Nobody really wanted Cena/Rock to be for the title anyways, it gives away the ending so easily. Now you can set Wrestlemania around Cena/Rock and Punk/Del Rio, so you still get your huge draw, but you can also see how CM Punk and Alberto Del Rio do without the polarizing elephant of John Cena being there alongside them to draw them more reactions. If that championship feud goes well, we suddenly have 4 guys who the WWE sees as main-eventers between Cena, Miz, Punk, and Del Rio. If you want Attitude Era-memories, you need multiple top tier guys.