I kind of just imagined the WY execs were who he was talking about anyways. They would make sense given the post-Aliens setting and the content of this particular story (and iirc, I think at least one of them was mentioned in The Cold Forge already).
It doesn't sound to me like he's going to be contradicting anything in Alien 3 here. Just that he's not going to explicitly acknowledge it, in case it doesn't stick, so that it doesn't "date" his story.