I think Massa will be stronger next year, which is could because he would push Alons
However I have my doubts that he will outperform Alonso over the year and be in the championchip fight till the end.
Assuming no car will be dominant:
Vettel will be there and Alonso with hoefully a better car than this year.
Button is some kind of inside tipp, because he often stuggles with the car when it doesn't suit him 100%, but also has some intelligance and major speed when his setup is right.
Perez will and must have some good races but he will also do mistakes which is absolutly normal, because he has now to learn to drive for a top team and cope with the preassure.
Kimi for me is the unknown: He was very constant this year, but I somehow missed the little extra bit from him and Renault in terms of performance and aggression.
Gorsjean (if he gets the contract, which I would give him because he certainly has the speed) should have learnd from his mistakes and be cooler next season.
I expect the same from Pastor and I think Hulk will also do good in the Sauber.
Well and Lewis....I really don't expect much from him or should I say from MGP. Besides Nicos win they have failed their expectations 3 years in a row.