But if David creates the Alien, the Engineer couldn't have died millenia ago with a cargo hold full of eggs. That's the question being raised: if David makes the Alien, who's in the chair?
Oh, we misunderstood each other; I was actually talking about who was in the chair if David didn't
But since you asked the other question, I think the same answer is actually possible for both instances. Based on what Scott is now gabbing about in the press I'd suspect David doesn't just create/remake the alien, he also fabricates the eggs which end up in the hold on the derelict. He goes to LV-426 and puts them there or works on the existing material on-site. The jockey does not necessarily have to be relevant to that. It's entirely possible he can simply find a dead Engineer onboard that ship in the chair - as in, the jockey - just like the Prometheus
expedition found the dead Engineers on 223.
That being said, yes, I'm now fearing Scott won't just have David perfect the alien, he'll have someone (like maybe even David himself, as some sort of ironic fate) in the suit, in the chair, as the jockey. Doesn't matter who at the moment. I don't like the idea but I think it's very possible this will happen in future. Personally I'd prefer they not touch it.
-There is no way of knowing, so there is no way of saying it like it's fact.
The production crew and multiple preview audiences have told you it is Engineers. This is the opposite of 'no way of knowing.' You don't want to believe it because you don't like what you hear. That's not anyone's fault.
"shaw is dead"
-again, nobody knows for sure.
See above response re: previews.