The story of the last 20 years of pop culture is, in many ways, the Victory Of The Nerd: Comic book films, gaming adaptations, the general adoption of deeply nerdy genre trappings like time loop stories, superheroes, and more, all making billions of dollars at the box office as geek obsessions infiltrate the body mainstream.
https://www.avclub.com/dune-other-great-unfilmable-sci-fi-novels-1851370740
AV Club suggests these five:
God Emperor of Dune (book 4)
The Caves of Steel (Isaac Asimov)
The Left Hand of Darkness (Ursula LeGuin)
The Sirens of Titan (Kurt Vonnegut)
The Player of Games (Iain Banks)
One of the main problems that some “classic SciFi” doesn’t get made into movies is that their plots are, frankly, often ridiculous or cheesy.
What would you want to see on the big screen finally?