Atlantis II: Shards of Chaos

Atlantis II: Shards of Chaos was the original proposed direct-to-video sequel to 2001's Atlantis: The Lost Empire.

Plot
The plot is currently unknown.

Why It Was Cancelled

 * 1) Atlantis: The Lost Empire had a poor box office performance due to competing against Shrek.
 * 2) A different title was decided instead.

Result

 * Shards of Chaos was permanently cancelled and completely reworked into another direct-to-video movie called Milo's Return, which was a critical failure.