Few thoughts and wishes...
1. I hope they have Cena walking through backstage surrounded by various wrestlers sort of like HHH after he turned on Flair.
2. I don't expect Cena to be fired but if he was, I would have him return around Survivor Series. RAW can certainly last four months without Cena, can they not? If they're seriously thinking about ending the brand split, then no better chance to try out Christian on both shows. Problem being that there aren't that many top faces which depends on when Morrison is coming back. It would be fun to see Del Rio and Bryan try to cash on Christian constantly since for now, there's only one title.
3. If Cena is still "fired" come Summerslam, I expect the main matches to be Orton vs. Christian and Mysterio vs. Del Rio since Mysterio will want to get retribution for Del Rio taking his mask off.