There are plenty of valid answers here, but Jodorowsky's DUNE is the greatest movie never made.
And by "greatest" I mean, completely batshit insane. It probably would have been unwatchable and completely terrible. But oh what a glorious mess it would have been.
@joehumphrey.bsky.socialWhat's the movie that almost got made but never came together that you're bummed about?
Mine is the William Gains biopic Philip Seymour Hoffman was trying to get made
