Group C has a real dark horse, at least when you read other predictions, in the form of 4th ranked in the world Colombia.
You must pick two teams to advance to the World Cup Sweet 16. Certainly Colombia, having the advantage of playing in South America, and how can the FIFA 4th ranked team in the world be considered a dark horse? For the second team? Ivory Coast, who has never advanced out of the Group stage in their World Cup history? Greece, who breezed through UEFA qualifying or Japan, a model of efficiency?
This may be the most difficult group to predict. Japan v. Ivory Coast in the first game is going to be crucial, as Greece is matched up against Los Cafeteros and a loss is going to put the pressure on the Greeks going into their second game against Japan because the Colombians are going to easily handle Ivory Coast.