I guess I'm starting with a book technically but Battle Royale would have made a better TV series than movie, the movie doesn't have time to delve into that many characters and the little side characters are what made the book so good.
They could change the events to keep it fresh, maybe even change the characters (they do seem to do that). and create a whole new mind-boggling maze of timelines. As long as they explained who was from which timeline I'd be happy.
Dune. You can’t capture the complexities of that book in a movie. You can smudge a lot details into scenes of Timothée Chalamet staring intensely at beautiful CGI scenery, but it misses a lot.