Pixar takes on princesses with the new film “Brave.” We discuss Pixar’s mother/bear-daughter story, but also the larger issues of female characters in animation and film in general. What’s wrong with the Disney Princesses? Why can’t girls play Belle or Ariel as if they were an action hero, anyway? How does Merida compare with the female protagonists in Miyazaki’s work? Did Pixar change its own fate?