Kevin Costner has always done his best to let the world know how big a hero he is. Whether it was saving Native Americans, saving England or becoming a mailman-prophet, The Costner has always risen to his own sense of greatness. Well, now he's going to play second fiddle to the greatest hero of all, by taking a supporting role in the new Superman movie. Common sense points to him playing Pa Kent, the salt-of-the-Earth purveyor of folk wisdom that made Superman into what he is, which gives him bragging rights to everything his son does, but Pa isn't the only fiftysomething man in Clark Kent's life. Here are some other supporting Super-roles we'd like to see him mix it up with.