User blog comment:Mark4518/X-Men’ Producer Would Love An ‘Avengers’ Movie Crossover/@comment-1895174-20130219133851/@comment-1895174-20130220210232

So he barely handled it. Thor, Hawkeye, and Black Widow were often thrown to the side, and Iron Man was the only character with a personal arc. Think about what would happen if he has to double that cast by pointlessly crossing over with the X-Men.