I think Rafal Nadal will win this tournament again. He is in great shape at the moment, not suffering from any major injury and with the psychological advantage of having beaten Djokovic recently at Rolan Garros.
Djokovic and Federer have great chances to win Wimbledon 2012 too and I think the pressure of being Britain Number 1 will make Andy Murray fall in semifinals or even final once again.

My point is that only four players have the same chance to win 2012 Wimbledon. I like Roger Federer on grass more than his rivals. Novak Djokovic

Rafael Nadal was a favourite to win last year, having two Wimbledon titles already, but last year he was beaten by Novak Djokovic. At the moment the odds are quite close between the two, though Nadal is still the favourite at 2 to 1 (Djokovic is at 3 to 1). However, as the championship doesn't start for a few weeks yet, a lot of things could happen in the meantime; and Djokovic is now officially the world no. 1 seed with Nadal in second place.

Roger Federer, who was world champion for five years in a row, will also be playing though, and as the tournament gets under way the odds may well change in his favour as he seems to be making a big comeback. The British No. 1, Andy Murray, is another name that the bookies are mentioning - could this be the year that he finally wins?

You'll be able to catch the changing odds here.

Updated information: Roger Federer won Wimbledon 2012 by defeating Andy Murray with 4 sets (4-6, 7-5, 6-4, 6-3)