Well, I think it's fair to say Movie Tony also has a great hunger for personal power? All right, his motives are benevolent, but I think a Mandarin could be done who did global interventions as part of building a personal power-base while not actually being evil - or perhaps, while having less-than-pure motivations but not actually committing any evil acts? Or maybe that would get too complex for a superhero movie.

There don't seem to be any notable Chinese superheroes in Marvel. (Well, there's Jubilee but she's Chinese-American and also her movie rights belong to Fox.)