The biggest comic-book movie to date (out May 4) is stuffed with fan-favorite superheroes, and the gigantic red carpet was chock-full of photo-friendly props. Staffers armed with boxes of goodies handed out Iron Man masks, Captain America shields, huge green Hulk fists and Thor’s hammers. Inside, moviegoers were treated to superhero-themed 3-D glasses. On the red carpet, Whedon seemed born to bring his all-star team together. “I’ve been reading Avengers since I was 11,” he said.