9. The Other Side of the Wind
How hard can it be to get a film made by Orson Welles, starring a major menagerie of talent, including the likes of John Huston, Peter Bogdanovich, Dennis Hopper? Apparently pretty bloody difficult, because filming on The Other Side of the Wind was reportedly "96% complete" in 1972, with intermittent reports of the final 4% trickling in over the interceding years. Bogdanovich has in recent years attempted to reconstitute the footage into a respectable whole - as the film was reportedly only about 40% edited by the mid-1980s - but laments the legal fracas that makes a complete cut unlikely; that various interested parties have claimed ownership of various aspects of the film. Releasing the film, it seems, would be an administrative nightmare.