If Europe was a country instead of like 50 separate countries or if they played like that Ryders Cup thing it might've been an interesting convo. But it's not so the convo is not really interesting.
That Serbia a country of like 5 million, should challenge the US does not make sense. Or France where basketball doesn't even rank top 5 I believe.
I think Canada, black Canada, might be the most interesting competitor. But that's probably not on the basis of having better players, it would be coaching, team dynamics, crowd, injuries and luck (i.e. not being series but just 1 game and you're out). I.e. Olympics 2004. But Olympics is in LA 28, so we'll have to wait until 2032