Prometheus Script Reveals TRUTH about Engineers, Black Goo and Deacon...

https://www.youtube.com/watch?v=3ONSFeRy9iQ

It is hoped that a couple more movies in the Alien series will connect more of the dots.
https://en.wikipedia.org/wiki/Alien_(franchise)#Prequel_series

Weyland-Yutani: Corporate Timeline

https://www.youtube.com/watch?v=wLeF6EqulUI

Of course, some people have watched these movies in chronological order while others have watched them in the order of the overall Alien story-line.