The world of animated Disney characters is a magical and exclusive one—I like to imagine it being guarded by the sort of golden gates that surrounded King Triton's underwater Little Mermaid castle. And the Disney princesses are an even more elite squad—a group of gutsy, gorgeous heroines whom, I have recently learned from reading Disney trivia, never make eye contact when portrayed together. One thing that's helped them keep the clique tight over the years: scrapped, changed, or otherwise…