Me and my shadow (2013)

Me And My Shadow is a cancelled DreamWorks animated film that was slated to release in 2012, and then 2014, before ultimately being cancelled. The film starred Josh Gad as Daniel Grubb, the world's most boring man and Bill Hader as his shadow, who would try to spice up his life and also try to confront a shadow villain who has the power to start a shadow revolution. The film would have been groundbreaking in it's use of both computer generated 3D animation, as well as traditional 2D animation for the shadow characters.