Probably the best rivalry of the PG Era. Cena has been the biggest face, and Punk the best heel.
PWI says the agreement was in place for Punk to be in the game in this scenario months ago so they didn't take him out. Plus he's in the alumni section of WWE, so I doubt it means anything as far as him coming back or it all being a work. Although he could use the time off after his heavy use the last four years.