Napoleon is also the subject of an unmade Stanley Kubrick film. The script, which Kubrick wrote himself (althought he did not cite his sources) was recently released on the internet, but was soon taken off with the threat of legal action. The script for Napoleon was dated September 29, 1969, which was relatively early in Kubricks career, and he had not yet made such an extensive reputation for himself so it is easy to understand why he did not get the financial backing needed to make the movie.
What is interesting is that the script contained extensive production notes including where it would be filmed (Yugoslavia, Italy), the suggested length (180 minutes), and the cost need to hire actors to play the numerious soldiers (including the price of uniforms, etc.) among other things. It is sad that Stanley Kubrick was never able to make this movie, for surely under his direction, it would have been great.