I don't like the US's chance to advance past the group stage. Portugal and Germany are tough and Ghana has their number.
Belgium definitely have as much talent as any team in the tournament if not the most. They also have very little experience, which is probably going to prevent them from winning it all.
I don't agree that Brazil has insane talent. They do have talent as usual, but they are lacking a couple of things. They don't have a creative force up top or in the center of their mid-field. Their keeper is old and has not played for high level teams the last couple of seasons. He is in the MLS right now. Neymar is their creative player on the outside. He will be healthy in time for the WC and the offense will go through him. We will see if he can handle the pressure after having a lackluster first season with Barca.
This should be a pretty wide open competition. I see a significant list of potential teams capable of winning it all. And a few teams that are capable of upsetting one of the favorites along the way.