Thread:ADour/@comment-5164970-20170419224239/@comment-4651179-20170419225353

The amount of importance given to Iron Man in the script isn't subjective either.

I additionally believe that the directors' words have more weigh than any possible interpretation, either your or mine. "We wanted both to be the protagonist and antagonist at different points of the film" is something Joe Russo expressed here. "So you're taking your protagonists and you're turning them into antagonists for one another" Anthony Russo commented here.

These interviews, marketing, promotional art and the nature of the story itself showcase both heroes as protagonists.