Tusker

Tusker was a planned animated feature from DreamWorks and Pacific Data Images (PDI). It was to be directed by Tim Johnson and Brad Lewis, the respected co-director and producer of Antz, and was to be the company's third CGI film after the latter and Shrek.

Plot
The film would chronicle a herd of elephants crossing southeast Asia. In their travels, they encounter a wide variety of dangers, including a band of marauding poachers.

Why It Was Cancelled

 * 1) DreamWorks decided to put it aside to make way for Shrek 2 and Madagascar.

Result
The rights were sold to Hong Kong animation studio Imagi Animation Studios in 2008, which was to be produced by Brooke Breton and written by Ted Hally, with a release date set for the first half of 2011. But the film was cancelled following Imagi's closure in 2010.