And actually in 2016, there will be such a tournament. The Copa America, which normally is held in South American for COMNEBOL, is going to be held in the US, and will include six teams from CONCACAF.
It is a one-off to celebrate the Centennial of COMNEBOL, but if it is a success, I could see it becoming permanent, and held concurrently with the Euro.
Cool! Yes, they should make something like that permanent.