F4WOnline.com is reporting that "as recently as last week", plans for CM Punk to close out Wrestlemania 29 were being factored into the card and plans for Wrestlemania. 

It should be noted that Punk has said on previous occasions that one of his goals before retiring would be to headline Wrestlemania and this could very well be that chance.

Of course, plans will change consistantly, but this is the year you feel Punk could/should be in that main event,