A couple of excellent documentaries focusing on the cancelled 1980s Cannon Films Spider-Man film, as well as James Cameron's ultimately-cancelled 1990's Spider-Man movie.
https://www.youtube.com/watch?v=BU3OfR986jk
https://www.youtube.com/watch?v=4fjRHwY1qQU
Wizard Magazine article on what was going on with the cancelled-Cameron directed Spider-Man movie in late '98/early '99.
(https://pbs.twimg.com/media/GLud5OtbwAADG_W?format=jpg&name=large)