Sounds a good idea to me, the only problem, being that,
Team Germany - six German riders, one Austrian rider, two Czech riders, haveing two Czech riders would shall we say be surfit with undoubtable winning talent, as its not hard to guess who the two riders would be.
Maybe a good idea woud be to have a Four Nations Cup,with the forth team being Team European, with riders being wild card entries , accepted from any EU Country.