One of the ways that African soccer has developed is through a competition called the Meridian Cup. It pits the best African v. Europe at the U-17 level. http://www.uefa.com/competitions/meridiancup/index.html Shouldn't something like this be tried? CONCACAF v. CONEMBOL perhaps?
It is a good tournament. Europe has dominated this year's edition I think only because of the age differences between the European teams and the African teams. African usually dominate youth soccer. But in this years tournament, the Africans rosters are composed of payers born in 1986 and 1987 while the European teams rosters are full of 1985 born players. But anyway good tournament for teams from both continents.