Should win -- Rupert. Definitely one of the best players, seems like a genuinely nice guy, and definitely popular with the viewers. If Jeff Probst ever leaves, Rupert should be the host.
Will win -- Amber. Rob's burned a lot of bridges to get to the final four. Unless he can do a LOT of fast talking at the jury questioning, anyone up against him will win.
Probably will win -- Rob. If Rob is casting the vote to take it from three to two, it won't be Rupert. I think it'll be Rob and Amber in the final two; even then, it'll be close.
Hopefully won't win -- Jenna. How the heck did she make it this far?? How many times was she called annoying? Yet she's still there? If she wins immunity twice and takes Rob with her, then she might win, but Rob still played a better game than she did.