“so many remakes of Classics instead of new original stories”
Agreed.
Any of the wonderful novels by Robert Charles Wilson would make great movies.
Kage Baker is not that well known but her books would be excellent for movies or even TV series.
I could list dozens of more authors with amazing SF books...
Maybe it’s time to stop watching and just go back to good old fashioned reading. Adaptations have made us lazy. I’m trying to watch less and read more. Even books I read 50 years ago take on a whole new experience re-reading them in my old age!