The Dune connection.
The story behind experimental filmmaker Alejandro Jodorowsky's cancelled adaptation of Dune is the stuff of movie legend, lovingly detailed in the 2013 documentary, Jodorowsky's Dune. Dan O'Bannon, who co-wrote the 1974 sci-fi comedy Dark Star with John Carpenter, was hired to supervise the special effects for Dune, where he also worked with Swiss artist H.R. Giger. When Dune collapsed, O'Bannon found himself sleeping on the couch of another writer, Ronald Shusett. O'Bannon would eventually reassemble much of the artistic team from Dune for Alien, including Giger, Ron Cobb, Chris Foss, and legendary French artist Moebius.
O'Bannon showed Shusett a script he'd started back in 1972 but had never finished.