I thought of making my own Global superheroes... but with the vast research that it will require, I simply let it go and crumble into the limbo of my imaginations. Besides, some countries don't need superheroes, since they claim to be a near utopia. And some countries don't even like their own flag. Or they are hardly patriotic at all (wonder how they survive as a nation).
What country would work to have a flag-insoired superhero? There's already Captain America (representing Uninted States), Vindicator/Guardian (for Canada), Captain Britain and Union Jack (for Great Britain), and perhaps Silver Samurai (for Japan). Although Africa (specifically the fictional country Wakanda) has Black Panther, he isn't exactly wearing his nation's flag as a costume (or does he?).
Over at DC comics you have Wonder Woman (yet she isn't American), the Rocket Reds (though the Russian Federation is no longer communist and has a very different flag now)...
What country would you like to see have a flag inspired costume? What would be their powers? Are they locally based or globe-trotting? Fill in your ideas and I'll get back to you with mine.