Thanks to Marvel Studios and the brilliance of Stan Lee, this is definitely the summer of the superhero. “The Avengers” kicked both alien invader and box office booty, and Spider-Man and Batman will soon join the fray with “The Amazing Spider-Man” and “The Dark Knight Rises” respectively.  Fanboys and fangirls may be whipped up in a geeky frenzy, but if you prefer your summer films cape-free, here are five movies that are sure to provide summer box office thrills, no super powers needed.