Well, in theory it's a bad bad draw for Roger. Tough opponent from the beginning.
Paire will be a nice "test-match", considering it will be tournament and season debut.
Then, probably Davydenko in 2nd round. Ok, Kolya always plays at his best in Doha, but will he be able to maintain that fantastic shape in Australia too?
Anyway it's a tough match.
3rd round, I think he will face one between Klizan and Tomic, which is favourite of course. He's in Sydney final, but he must stay focused even if he will have to play another time in 2 or 3 days.
4th round, maybe Raonic or Kohlschreiber. I heardt Milos is suffering a little foot injury, so he won't be at his best in Melbourne, but he must be considered as a dangerous opponent anyway. Kohlschreiber is not "scary", but he has his chances, even if he'll play a final in Auckland too.
But I can see nobody that could defeat these two guys before the 3rd round in that draw section, so I think Federer would face one of them.
QF could be agst Tsonga, and anything could happen. Anyway we have 3 possible opponents here: Tsonga himself, Haas and maybe Gasquet. What a match would be anyway!
And also a 4th round between Haas and Gasquet would be great
Then the semis against Murray, but it will be very interesting to see a QF between Andy and Del Potro. Most attractive hypothetical QF of the draw, no doubt about it.
Murray himself has a good draw, all things considered. Easy until 4th round (Haase, Sousa, F.Mayer/Stakhovsky...no problems).
Then he could face Simon, but he's suffering an injury too, if I'm not wrong. Dolgopolov and Lu cannot beat him anyway.
Then, the QF agst Del Potro. But I hope Juan Martin will face Andreas Seppi in 4th round: he's playing very well, it's time to capitalize in GS also. Let's go Andreas.
Ferrer, of course, has the "weakest" section of the draw. It could become interesting with one between Delpò, Tsonga and Berdych in his QF, but David (another time after US Open) picked Tipsarevic, which could even reach semifinals, I think.
Interesting match will be Dimitrov-Benneteau, let's hope "the new Federer" (and new Sharapova's boyfriend...good catch Grigor

) will finally rise.
And eventually, we have Nole. Tough start against Mathieu, but after that, I can't imagine how he couldn't reach QF without any problem.
But I'd say even semifinals, cause Berdych don't seem in his best shape, and even if he was, I don't think he could beat Novak.
Semifinals could be even easier, against Ferrer or Tipsarevic.
So, summing up, Djokovic straight to the final. Murray 60%-Del Potro 40%, Federer has the toughest draw and he won't be favourite in a hypothetical semifinal agst Murray.