Worried that the highly anticipated Avengers film will suck? Robert Downey Jr. (Iron Man) shares your worries, too, telling MTV News that the filmmakers are actually working hard to make sure the film works well.

"If we don’t get it right it’s really, really going to suck,” he said. “It has to be the crowning blow of Marvel’s best and brightest because it’s the hardest thing to get right.”

He continued, adding that it will be tough to combine the radically different worlds of the superheroes in one movie universe. Iron Man was set in a rather realistic world where anything shown in the movie is not out of the realm of possibility; Thor’s universe will be fantasy-tinged and Hulk’s universe, while realistic, is more comic book-like.