After the success of Ridley Scott's "Alien" in 1979, James Cameron directed "Aliens" in 1986, before going on to helm such mega-hits as "Terminator 2," "Titanic" and "Avatar."
 
However, after a half-dozen more sequels and spin-offs, Cameron says he isn't interested in returning to the long-running "Alien" franchise.

While reactions were mixed to this summer's "Alien" prequel "Prometheus," Cameron enjoyed it. 

"I enjoyed 'Prometheus'; I thought it was great," he told Moviefone. "I thought it was Ridley returning to science fiction with gusto, with great tactical performance, beautiful photography, great native 3D. There might have been a few things that I would have done differently, but that’s not the point, you could say that about any movie."

When asked if he'd ever be interested in returning to that same universe, he answered, "No. No, I feel that I’m too far away from it right now, too much other work has been done -- too thickly layered, a palimpsest of other talents from Fincher to everybody that’s come along since."

Cameron's "Aliens" earned $85 million at the domestic box office, and was followed by the David Fincher-directed "Alien 3," and, later, "Alien: Resurrection," two "Aliens vs. Predator" films and "Prometheus." A sequel to the latter is in the works. 

Meanwhile, Cameron is planning three more "Avatar" movies, with the fourth one being planned as a prequel.