Santa Calls

When 20th Century Fox bought Blue Sky Studios, their first feature film with them was originally going to be an animated film based on the children's book Santa Calls by author William Joyce.

Plot
It follows Santa Claus asking three gifted children to help him defeat an army of dark elves and save Christmas.

Why It Was Cancelled

 * 1) There were difficulties to improve the CGI animation.
 * 2) There were some problems with the production.
 * 3) A short film called Bunny was made.