Well, they're releasing just Predator on Blu-ray to piggyback on the release of AvP:R next Tuesday, so they're probably going one-by-one, rather than doing an entire box set of them. I'm guessing they'll wait until they've released them all individually, and then do a huge Blu-ray box set of all 8 films (Alien/Predator/AVP) - perhaps 9, if they time it to a DVD release for AVP 3, should it get made.