Napoleon

Sometime after the success of 2001: A Space Odyssey, Stanley Kubrick expressed interest in making a movie about Napoleon Bonaparte.

Plot
The film would talk about the life and legacy of Napoleon Bonaparte.

Why It Was Cancelled

 * 1) The full cancellation reasons are unknown, but one reason it was cancelled was because Stanley Kubrick died in 1999.
 * 2) A similar film revolving around Napoleon, Waterloo, was released in 1970 and performed poorly at the box office.

Results

 * The Stanley Kubrick version was permanently cancelled.
 * In 2016, HBO announced producing a miniseries about Napoleon based on Stanley Kubrick's screenplay and had Cary Fukunaga at the helm as director.
 * Kubrick eventually used some of his Napoleon research in Barry Lyndon.