A follow-up to Alien: Romulus is in development at 20th Century Studios.The sci-fi-horror which starred Cailee Spaeny and David Jonsson terrified audiences when it hit theaters in August and now the studios boss Steve Asbell has revealed that the company are trying to get the two actors and director Fede Alvarez back for another movie.He told The Hollywood Reporter: Were working on a sequel idea now. We havent quite closed our deal with Fede, but we are going to, and he has an idea that were working on.He added...The two survivors, Rain and Andy, played by Cailee Spaeny and David Jonsson, were real highlights of the film. And so I always think of it like, Wow, where do people want to see them go next? ... We know theres going to be aliens. We know theres going to be great horror set pieces. But I fell in love with both of them and I want to see what their story is.ALIEN: ROMULUS20th Century Studiosloading...READ MORE: 12 Movie Reboots That Are Also SequelsThe Alien franchise has also crossed over with the Predator series, with the two terrifying creatures coming to blows in 2004s Alien vs. Predator and its 2007 sequel Requiem.While Asbell teased there would probably be another cross-over between the two series, the studio boss admitted 20th Century are yet to green light such a project.He explained: It wouldnt be in the way you think. Thats the thing. Not in the way that it will just be called Alien vs. Predator or anything like the original movies.If we do this, theyll be organically created out of these two franchises that weve continued with characters that we fall in love with and those characters will combine ... perhaps. But we havent gotten to that point. And were not just going to bang it out.As well as this possible crossover, Disney which is the parent company of 20th Century recently revealed they were working on the sequel Predator: Badlands for a 2025 release, with Elle Fanning set to star and Prey director Dan Trachtenberg confirmed to return to the franchise.However, Asbell also revealed the studio was working on a second Predator flick that will also see Trachtenberg behind the camera.The executive said: Weve actually done two of them. Two are coming out next year. One I cant talk about yet, but the other one is the live-action Predator film with Elle Fanning that just wrapped in New Zealand. Thatll be out theatrically sometime next year.He added: Theres a second Predator movie that we have different plans for. Dan has actually directed both.Get our free mobile appEvery Alien Movie, Ranked From Worst to Best