PDH wrote:Tony Stark as portrayed by Robert Downey Jr. is a much more interesting character than Bruce Wayne as portrayed by Bale. I think that holds for nearly every version of the characters, actually.
That's because Tony is open about being Iron Man and is naturally a flamboyant character, while Bruce Wayne is the mask for the Batman, who is a dark, brooding character. It's just the way the characters were created.
The emphasis on Tony over Iron Man in the movie is just the continuation of movie heroes having alot of face time without the mask, be it Iron Man, Batman, Cap, or Spidey. The actors want to be seen, not just in a mask or CGI voice overs. They probably have some percentage of face time clauses in their contracts when they make sequels.