Chanticleer

Chantecler was a planned Disney film, based on Edmund Rostand's play with the same name. Walt Disney Studios had it in mind for 20 years between the 1940's and 60's. It was briefly revived in mind during the early 80s

Plot
A rooster believes his crowing makes the sun rise.

Why It Was Cancelled

 * The reasons for its cancellation remain unknown to this day.