Right now Smackdown doesn't have a world champion. Edge could beat out Cena, and take the title back to Smackdown. Then again with Punk in the mix ultimately this could go his way, should he decide to take the title off of Edge once he defeats Cena. In other words sort of a 3-way dance in you add Punk to the mix with his MITB win.
Then again the WWE could make this exciting, and have Cena beat Edge after a tough battle in their last man standing match. Punk comes out, and hits Cena with the GTS. Think about how many fans would cheer to that. That may very well put Punk over, as he could come out on SD and say that it was just way to get the title back to the fans that it belongs to, SD. That way he could stay face, and who knows maybe a match with Cena on Superstars just to even things up a bit. I think it would be a good move on Punk's part either way it is played out.
Then again the WWE could make this exciting, and have Cena beat Edge after a tough battle in their last man standing match. Punk comes out, and hits Cena with the GTS. Think about how many fans would cheer to that. That may very well put Punk over, as he could come out on SD and say that it was just way to get the title back to the fans that it belongs to, SD. That way he could stay face, and who knows maybe a match with Cena on Superstars just to even things up a bit. I think it would be a good move on Punk's part either way it is played out.