As has been previously speculated, 20th Century Fox‘s plans for Neill Blomkamp‘s proposed big screen foray into their Alien universe appear to be on hold. In fact, “holding” and “pending” are the terms Neill Blomkamp himself used in a Tweet the filmmaker published earlier tonight:
https://twitter.com/NeillBlomkamp/status/659897245353951236
Ridley Scott’s recently-announced Alien: Paradise Lost is the Prometheus sequel to which Neill Blomkamp refers. That film is about to begin production in Australia for a December 31, 2017 release. Scott has previously suggested that it may be followed by additional sequels which could theoretically threaten to delay Neill Blomkamp’s Alien project indefinitely.
Unfortunately, there’s no guarantee that Neill Blomkamp’s project will ever come to fruition, although Blomkamp himself does not seem to have given up hope. There’s also the potential return of Sigourney Weaver to consider as Blomkamp has continually suggested that Ellen Ripley is an important character in the story of his film.