Ermm no he won't.
As long as Roger's in the game, he won't win a slam.
Nadal's injuries are catching up with him and his game's waning, like many have foreseen, because when you take away his finesse and power, he ain't got anything special in his artillery...but he's still a winner and he's only had injuries after the Australian Open win so it's still too early to say if he's a spent force. Plus he's also still very young and have lots of time to regain the No. 1 slot.
Del Potro will continue to remain a nuisance for everyone.
So will Djokovic...although he's a bit erratic and inconsistent.
Then there's the resurgent Roddick whom I think will surprise a lot of people this year.
And lest not forget, Murray's only where he is simply because Nadal has had an injury-stricken season thus far. Actually, we can include Roger in there too. Roger's last 2 slams, albeit highly commendable, come at the expense of an unfit Nadal not being able to push him to the limits.