Really hard to make a good prediction at the moment, so far we have seen every team play at least one and max two games. There were several surprise during the first week that make finals a bit more unpredictable. Usually I don't bet on the tournament winner before the semi finals. Too many things could go wrong and a strong team might get knocked out early. Just look at Germany for example, they are probably out tomorrow.
So my first prediction for the finals is Brasil vs France, the two teams convinced me the most and I think they get very far during the Worldcup. My second prediction would be Brasil vs Spain, Spain had such a good first match that they could go deep this year as well. Beating a team 7-0 during your first match should make every player on the team hyped for the tournament. I believe in streaks during football games and a lot of momentum will be carried over to the next match.