Yeah, I think Vixen being a former/future/current member of a JL can represent the more mainstream American Superhero community already, while being somewhat of an outsiders from it. But confronting her with people who comcs where country where vigilantism isn't seen as much in a good light as in the US (most of Europe for instance) or countries which are often overlooked by the Western world (from African countries which aren't all South Africa or Kenya; Asian, like Central asian countries, etc.).
Such a team probably wouldn't be as chummy as the JL but it could be a great way to foster and showcase a better understanding between countries.