Of course there will always be the favorites in Brazil (as the hosts, but their prospects dont look too great, but its brazil so we'll see), Argentina, Spain, Italy, France, etc. The team to watch in 2014 is Belgium. Yes. Belgium. and watch them again in 2018 too. If I said their entire team was like Khedira's and Mullers and Ozil's and Lahm's, but even younger, you'd be scared right? Yeah. Watch them.
I'd like to say watch out for Austria and Russia, but we'll see if any complete teams emerge.