This movie is Paul Rudd, through and through. It is the role he's deserved after a career of being the best part of every film he's made. He does not waste his moment in the spotlight, and the film is all the better for it. There is heft to the film, but with his performance, it doesn't have to be an obnoxious weight. If he's not as serious as Captain America, he is every bit as earnest. Marvel's Cinematic Universe needs Rudd every bit as much as it needs Downey, Jr. or Pratt.