if you like this kind of thing i bought a book at barns and noble called "The Greatest Movies You'll Never See", and it talks about all kind of movies from awesome directors that for some reason or another were shelved, abandoned or unforeseen circumstances prevented the production from advancing. It's a pretty good book and has artistic depictions of the possible movie posters. here's a link to the amazon whatever thing. https://www.amazon.com/Greatest-Movies-Youll-Never-See/dp/1844037746
i highly recommend checking it out at the library or something,it's a very interesting read.
Too many to list. I highly recommend the book, The Greatest Movies You'll Never See by Simon Braund to anyone interested in the subject matter of unrealized movie projects.