tb1971 said:

Surprise, surprise... I might have stumbled upon more Alien 1-4 materials, most of the things we never heard of. Will keep you posted as more info becomes available. It seems Alien Appendix #7 might happen way before Ridley starts working on Alien 5 :)

Great news! And here's an idea for an easter egg: on last weekend's Saturday Night Live, there was an Aliens parody involving Sigourney Weaver and James Cameron (the real ones!). It was not very funny to me but since it's Aliens related, why not include it :)