They don’t come much bigger than the movie that’s going to be closing out this year’s Tribeca Film Festival: Marvel’s superhero mash-up The Avengers. The fest announced today that it will premiere the movie on April 28, days before its May 4 release, so that New Yorkers can exult in the spectacle of watching Iron Man, Thor, and all the rest save Manhattan (and presumably the world by extension). Joked director Joss Whedon, “I’m thoroughly psyched to be closing the festival with our intimate little think-piece.â€