Assuming all three remain true to their source material, each will be a very different vision of the future. Ringworld takes place nearly a thousand years from now in a post-scarcity culture. Written in 1970 and the first of a long-running series of books, the titular Ringworld is a vast habitat in space.
In Ringworld, our hero is a bored 200-year old hired by some aliens to investigate this artificial world—a 600 million-mile (950 million km) ribbon orbiting a Sun-like star. It's been awhile since I've read the book but it's easy to see how previous attempts to adapt it for the screen have ended in failure. But with an Amazonian budget and and ever-more capable CGI, now might be the perfect time to try.