You know, I can't tell this for certain, but from what you've stated, I think it's generally a pattern of studio PR. It's like a secret language, and I might have cracked the code.
I am not at liberty to speak about the details
The fact that you mentioned he looked around before saying so helps my opinion on the matter. And considering Alien3 showed a new design of xenomorph, it would be incredibly foolish to leave the predator-bursted alien out of the sequel.