Where the Wild Things Are

Where the Wild Things Are was a planned Disney film, based on Maurice Sendak's book with the same name.

Plot
Animators Glen Keane and John Lasseter (who later moved on to Pixar) completed a test film blending traditionally animated characters with computer-generated settings

Why It Was Cancelled
Universal Studios purchased the rights in 2001, and produced its own adaptation.

Result
The film was a commercial failure yet a critical success.