Re: Who's your favorite now the draw's been made?
1. Federer can be disqualified from this debate, since Submiterer will not trouble Nadal as usual. Nadal takes this 3-0 (maybe 3-1) and stays fresh.
2. Murray can be disqualified from this debate too, because he is Nadal's pigeon at slams and he will face fresh Nadal. This match will not be as easy for Nadal as his warm up against Fed, but he will routinely win this match 3-1. Murray can only hope for 5 sets but it will hardly happen.
So the real debate is between Djokovic and Nadal, since their final is a lock.
Nadal always has at least some chances against Nole, but I would say that The World #1 will prove again (like W2011, among other tournaments) that he is really a better player. Just look back at the RG SF - Nadal's favorite surface, favorite tournament and his best conditions, Nole on the other hand had too many terrible moments but he was still very close. All of this simply means that he is favorite on all other surfaces, including grass.
So in conclusion:
final: Djokovic - Nadal (99% probability) or Murray (1% probability)
winner: Djokovic (55% probability) or Nadal (45% probability) or Murray (0.1% - statistical error)