Here's what'll happen. My prediction and hopes:
Cena wins I Quit this Sunday, of course. Cena then is forced to defend the title against a mystery opponett the night after for the WWE Championship in the main event, made by anonymous GM. There's a RAW Superstar who comes out (Not Miz, or Ryder.. Maybe Swagger) and Cena is about to win when Zack gets involved in the match somehow and costs Cena the belt.
Cena and Ryder go on to have a rivalry to start of Ryder's push.