Years ago I read the Alien book series where some guy wrote a follow up to what happened to Ripley, Hicks, and Newt after the Aliens movie. He wasn't allowed to let the names stand though due to copyright so he did some editing to make it like a separate trio escaping from an alien infested planet.
It was pretty good light reading. As expected the damn things get loose on earth eventually. I stopped reading eventually so don't know how far he wrote but I know I read 3-4 books.
I'm guessing since the title has "Earth" in it then we're looking at the same outcome. I'm very excited about this, Alien is my favorite franchise.