Punk wasnt pulled due to the injury. He was originally scripted to do a promo, and was backstage at the show. When the show was re-written, the decision was made not to have him on because of the belief that audience would cheer him so much and that wasnt what WWE wanted. So they had Paul Heyman, who was cheered heavily, only do a backstage promo (so the cheers wouldnt be as noticeable) and he said how Punk would be talking, but not until next weeks show. The idea was to build something for the next week.