By Jonathan Wilson In the last four World Cups, 13 of the 16 semifinalists have come from the same continent. Will the Qatar edition mark the first time in 20 years that a non-European nation takes home the trophy? Seven-and-a-half months out from the start of the tournament, the World Cup exists in a realm of pure potential. Nobody is injured, nobody is out of form; as the draw was made in Doha, it was possible to imagine the 32 teams at their best, as they would be if nothing went wrong between now and then. And that’s the problem with previews this far out. There can be no signings to compl…