Mattel is following up the Barbie Princess Series and the Spring 2005 release of Barbie Fairytopia with Barbie and The Magic of Pegasus, a new 3-D enhanced animated film that is slated for a fall release. As with past Barbie releases, a full line of new merchandise — consisting of themed princess dolls, winged horses and play sets — is being introduced to coincide with the theme of the movie. That merchandise is slated to hit stores in June.