Well last time we saw Rock he and Orton were up in each others faces. It was the night Eugene took on Triple H and they got all his friends out of the building beforehand. So continuity-wise, they'd have some 'splaining to do.
As for Orton getting over, it'll happen. As long as they don't book him to be a pussy with the 3-1 odds. Have him come out and run them down for turning on him, saying that he should have never put his dream aside for Triple H, and if Batista and Flair want to be his lapdogs, so be it. That could actually make for some tension in Evolution and maybe instead of rushing into the Trips/Orton deal (which I know they don't want to do) you could prolong it with a little bit of "Is Batista sick of Triple H? Is Flair? Are both of them?", etc. Turn one and work a tag feud for a month or two to give this some longevity.
Also, I think Michaels will show up tonight at the wedding in some form. Hardy should have been written out of the story with the Summerslam loss, but since he wasn't, I say Bischoff goes the whole "firing" route with him.
I also think Edge will continue the slow burn to his turn and get approached by his brother. Rhyno/Tajiri vs. E&C could be a very good match, IMO.