I think that the movie as we know it is dead, at least until Ridley has finishing his prequel suite. Once all the prequel cards are on the table and Fox are still willing to invest in more Alien movies, I wouldn't be surprised if they recycle parts of Blomkamp's manuscript and concepts for their next Alien project.
Hopefully, a most likely, they won't go with the BS retcon part of A5 and instead have other characters to fill in for Hicks and Newt and possibly even Ripley, unless Ripley 8 will not be the main protagonist in the movie.