Ridley Scott is 88. But he has not stopped. Still, he has several movies in the pipeline, including the third Alien prequel.The movie will connect to Prometheus and Alien: Covenant.And according

So, there's a io9 article about the Alien prequel that Ridley Scott is making. He says he is going to explain the story of the space jockey that was found in the first film. I am almost 100% positive there was a comic (Dark Horse?) that covered this.