In Predator 2 it was a regular drone skull, not a queen. But I never took that easter egg seriously because Xenomorphs are supposed to have exoskeletons, like insects. Not an endoskeleton (what humans have), like what was depicted in Predator 2.
And yeah, in Prometheus it's two different ships on two different planets. But my point is that Prometheus implies the Xenomorphs did not exist in the 2090's. Ten years later (Covenant), we see proper Xenomorphs (I'm assuming, I still haven't seen the film). And another twenty years later, the crew of the Nostromo stumbles upon another derelict ship on another planet full of thousands of Xeno eggs. Only problem is, the derelict ship and remains of the Space Jockey look to be very old. Hundreds, possibly thousands of years old.
If the Xenos were only created twenty years earlier it's impossible for there to exist an "ancient" wreck with Xeno eggs in it. Promethus conflicts with what was shown in the original Alien. I know there was no explicit age mentioned in-film, but all evidence points to the wreck being very old. Not a mere eighteen, nineteen years old.
