I'm currently trying to create my own team of International Heroes. I've never felt one has been done well; even DC's Justice League International fell short in many respects. For my project, my parameters are as follows:
*The team is called The World Champions. They have a setup similar to The Avengers': The United Nations provides them with permission to operate and resources, but they are largely self-governing. However the team must have one hero representing every UN Security Council Member nation. This means the "core" of the team will be an American hero, a British one, a Chinese one, a Russian one and a French one. There will also be 10 other heroes, who will be a "rotating" membership, again like The Avengers' or the JLA's.
*I want the heroes to represent the various types of cultures of the World. However I also want to avoid stereotyping, which is a tricky part. Similarly while I want a variety of Superhero Archetypes, I also want to avoid making all of them too "American". I'm doing research on the comics and cartoons from those countries for these purposes.
The main heroes so far are:
*From the USA, a caped Flying Brick (yes, its based on Superman, but hey, if the rest are going to be more original, then at least this one can be a homage!

*For the United Kingdom, I'd like a Celtic Hero, probably a Neopagan Spellcaster (I've never done such a character before, and I want to experiment.)
*For the Russian one, I'm thinking of just using the public domain character Octobriana (who wasn't really made in Russia, but whatever, I can just base mine on her otherwise.) Female Brick with a bad attitude; I'd love to play with her and defy the Cold War era stereotype.
*For the French one I'm going with a masked Badass Normal, if for no other reason than they are so prevalent there.
*My research indicates that the Chinese one should be based on legendary warriors with mystical gifts. Not sure exactly which abilities; I know I don't just want to make him/her (not decided on gender either) just another Super Martial Artist.
I have not decided yet which the other 10 countries will be, I'm open to suggestions there. Advice on the types of the characters would be welcome too, ESPECIALLY regarding names- I tend to suck at naming characters!
