Since the merging of Disney and Pixar in 2006, the Disney-branded computer-animated films have gotten better and better, moving far beyond the forced silliness of Chicken Little (2005) as they hit their stride with Tangled (2010), a humorous spin on the Rapunzel fairy tale, and reached a comedic and nostalgic high note last year with Wreck-It Ralph (2012) (the obvious cash-in of this summer’s Planes notwithstanding).