I think that Ozzy will return from RI. First, all the rainbows shown with him saying that he will stay in and fight. Second, all the attention he has already received at RI, first with Keith and the fish, then when Jim joined. We barely saw anything of Christine when she made her run and she came up short. Sure Ozzy is a returning player and great eye candy, but he is and always has been the challenge hound, that is the one part of his game that he hasn't messed up much.
Third, the scene with Coach talking to Ozzy about him making it through and coming back, Ozzy showed he wasn't that cocky, he was humble when he said "I don't know about that", and Coach looked him in the eye and said "come on man, you can do it." giving him the pep talk.
Finally, this was very subtle but I believe it most telling. The conversation Brandon had with Cochran where Brandon asked "how many times do you get the chance to vote out Ozzy". Cochran answered "apparently two" and gave a soft laugh, not in a mean way. Brandon thought about it and agreed "yeah".
For Cochran, that means this was his second chance to vote out Ozzy and he won't get that third chance, Cochran will get voted out during this path and will face Ozzy at RI and Ozzy will prevail. (how ironic if he beats him in a puzzle challenge )
For Brandon, this tells me Brandon will still get one more chance to vote out Ozzy (as this is his first chance now) and that Ozzy will be the returning player.
His first 2 challenges will be the toughest, against Keith and then Jim. After that he will have to face (in no particular order) Whitney, Dawn, Edna, and Cochran. Another irony will be that Ozzy beats Cochran the same time as he re-enters the game.
Ozzy will be back, we haven't heard the last of him, yet.
I'm not sure who came first hosting games, you or Tribe, but you are both nefarious! - CTGirl