Who Discovered Roger Rabbit

Who Discovered Roger Rabbit is a proposed prequel to the 1988 Disney/Amblin film, Who Framed Roger Rabbit. The film, which previously went by the working title, Roger Rabbit Two: The Toon Platoon. It would have been a direct-to-video musical film.

Plot
Roger Rabbit and Baby Herman go on a journey through the perils of the war in search of Roger's birth parents in the Americas during the Second World War in 1943.

Why It Was Cancelled

 * 1) Steven Spielberg refused to work on the film since he worked on Schindler's List and thought it would be disrespectful to Holocaust survivors.
 * 2) Disney expressed no interest in making a sequel.

Results

 * The film was permanently cancelled.
 * The first film is stand alone.
 * Instead of making a feature length sequel, Disney continued making Roger Rabbit cartoon shorts.