Well, I'm satisfied with what is possibly the first Asian Pixar character in the form of Russell (who I just found out today is Korean in an interview with Andrew Stanton in an Empire issue), and there was a pretty good spoof of the Japanese drifting culture in Tokyo Mater... I'm interesting to see what other cultures Pixar will go with for Cars 2 and The Princess and the Bow. I'm Chinese, but the Chinese culture has been explored before in Mulan and Kung Fu Panda, so maybe Pixar should try something different?
I agree with Princess_Darkness that maybe they should attempt a Latino-setting with Hispanic characters. We saw a hint of that with Ramone from Cars, and maybe Happy Feet and Beverly Hills Chihuahua, but they're a little stereotypical at the moment. Something along the lines of Road to El Dorado or The Three Callaberos would be nice.
Having watched Princess and the Frog and Sherlock Holmes, I'm kinda in the mood for more movies of that genre, so yeah, I suppose it would be interesting if Pixar told a story set in the misty bayou, or the gritty streets of Victorian London.
Of course, I would be over the moon if Disney tried out a surrealistic fairy-tale in Japan Miyazaki-style. The closest they got with is Up, which has parallels in Howl's Moving Castle and Spirited Away, so we know that if a Western studio were to attempt something of that 'level', Pixar would be the best bet.
Native Americans, Aborigines and Africans are not explored enough in popular movies as cultures too, and it would be cool if Pixar adapted a family-friendly comic like Yakari or Kirikou...
No matter what culture they choose to explore, I'm sure Pixar will do it respectfully and tactfully.
