I'd love for there to be no explanation about what happened the '79 jockey. Retcon the creature, but direct sequel or not, let that particular mystery to stand.
If that doesn't happen, I at least want a convincing story for why the hole isn't from a chest burster as most assume. '79 offered no in depth exploration of the chamber or chair and I believe the earliest story suggested it was a xeno tail that caused the hole. The torso and acid holes should offer plenty of opportunity to creatively fill in the blanks. I don't need to see titular aliens, but chest bursting has become as ordinary as the resulting xenos Scott no longer favors.