Sometimes, Orlando's Walt Disney World proves to be a little too small, after all. As the Florida resort battles changing entertainment standards, longstanding classic attractions throughout the resorts four theme parks -- the Skyway aerial trams, the 20,000 Leagues Under the Sea submarine excursion and the future-predicting Horizons ride to name a few -- are torn down to make way for newer, flashier rides. The Mickey Mouse Revue, an automated musical tribute to Disney songs that opened with