I'm brazilian, but i'm hoping argentina wins this world cup!
It's a sin to say something like that here, but Messi is just too good a player, that he deserves this one. A great player (unfortunately) just becomes a legendary player winning a world cup*! Too bad their team sucks nowadays!
If not them then, of course, Brazil... and then England, those poor guys - 44 years already!
*there are exceptions, but very very few of then: Puskas, DiStefano, Zico (here in Brazil - we have a saying that is something like this: Zico never won a world cup. Well, too bad for the world cup!), Cruyff... those are the only ones I could think.