Anime that is based from a western movie There are a lot of western movies that are based from anime, such as Dragonball Evolution, Tekken, Blood the Last Vampire (based on Blood+), and Street Fighter. The Matrix movie is also strongly influenced by Ghost in the Shell and the action scenes were drew upon their admiration for Ninja Scroll and Akira. 

So my question is, was there an anime produced based on a western movie or series (not on western literature or novel, so movies that are based on novel are excluded) ?
Off the top of my head, there's Highlander: The Search for Vengeance. It was produced by Madhouse and written by David Abramowitz, who worked on the Highlander TV series. Obviously, it's based on the Highlander movie and TV series in the west.