The one that proved Disney could do self-deprecation. Sequels are a dime a dozen in the animated genre. From Shrek to Toy Story to The Lego Movie, if an animated feature film performs even remotely well at the box office, a follow-up is all but assured. But in their eight-decade history, Walt Disney Animation Studios had essentially ignored this practice, with 1990's The Rescuers Down Under oddly standing as the only animated sequel in their canon (I don't consider Fantasia 2000 and Winnie the Pooh to technically be sequels...