I'm currently working on another post so sadly this will have to be relatively short and lacking in depth because I'm going to Sydney tomorrow but here are my two cents.
Rafael Nadal will have a relatively simple first three rounds I believe. None of those names besides Tommy Haas really stand out on grass but Haas is near the end of his career really. For some reason instinct tells me to look out for Ryan Sweeting though Andujar will be a tough opponent. Del Potro is stationed as a potential fourth round opponent but Gilles Simon is in the way.
A weaker field makes up a potential QF opponent for Nadal with Fish, Verdasco and Berdych the main names. However none of them have played well recently.
Andy Murray has a few dark spots to look out for but they shouldn't be too much of a hindrance. Ljubicic, Cilic, Gasquet and Wawrinka are his main threats. However if he is to make the semis he might have Monfils or Roddick, potentially much tougher opponents.
Roger Federer has been handed a rather simple draw. His draw is dotted with clay court specialists like Ferrer and Almagro. His biggest threat might be Tsonga though I'll wait to see his form.
Whilst Djokovic has some potential dangers but it all lies down to Robin Soderling as I don't think any of the other players can beat him yet.
On the men's I think we'll be seeing Federer taking another Wimbledon but Djokovic shouldn't be far behind, it'll be interesting seeing where Djokovic is at on Federer's favourite surface. Murray has potential to make it whilst I don't see Nadal doing another double this time.
The women's side should be more interesting with the inclusion of the William's sisters. What makes it better is that both lost last week in their return so they aren't necessarily guaranteed the win but it is very well possible.
I'm going to keep this short btw. Section 1 I can only see Cibulkova breaking Wozniacki, but Goerges has beaten her twice this year already so...
Sharapova will be an obvious favourite. Stosur who played well last week will be her main opponent. Safarova and Peng can also do some damage.
Na Li is seeded 3rd here, could she do a double? She has an ok draw early on with most journalists agreeing that Sabine Lisicki could do damage. I don't see Ivanovic or Radwanska making a move though. Bartoli is stationed next to Serena, could be interesting because Bartoli has the potential to do some damage with her win at Eastbourne. Maria Kirilenko is also somebody to look out for.
Will Schiavone go out in Round 1 like last year? She has Jelena Dokic in Round 1 and could see Makarova, Peer or Petkovic. If she manages to survive that she has a few dangers lurking beneath. Pavlyuchenkova, Hantuchova and Azarenka are all thirsty to do some damage here.
Finally we have a pretty tough draw in Sections 7 and 8 with Kvitova, Wickmayer, Kuznetsova, V. Williams and Zvonareva all looking to do well here.
I really don't want to predict the winner because there are so many what ifs.