Set between Alien and Aliens
https://variety.com/2023/film/news/alien-romulus-set-between-first-two-cailee-spaeny-1235810521/share
“It’s supposed to slot in between the first movie and the second movie,” Spaeny tells Variety’s Michaela Zee. “They brought the same team from ‘Aliens,’ the James Cameron film. The same people who built those xenomorphs actually came on and built ours. So getting to see the original design with the original people who have been working on these films for 45-plus years and has been so much of their life has been really incredible.”