User blog comment:Mark4518/X-Men’ Producer Would Love An ‘Avengers’ Movie Crossover/@comment-1895174-20130219133851/@comment-3317214-20130220230656

Dude, no. He handled it beautifully. Thor and Hawkeye had a little less to do for the plot, which worked out great. They had plenty of screen time and enough character development. Iron Man was not the only character with an arc (unless you mean "arc reactor", right?). If you add in other universes for a major crossover, (which I'm not even saying I want), then your focus would be on some key people, it would need to stretch over a number of films, and if the writing is as good as Whedon's, then it could work (Lord of the Rings is an example).

Did you even read what I wrote before?