Speaking with Joystiq, a SEGA rep confirmed that "Aliens vs. Predator will be the first to ship out of our triplet of Aliens titles; hence it was shown at this year's E3. We'll have more news to share about the other two games in the near future so stay tuned."
Furthermore, Gearbox president Randy Pitchford has confirmed to Kotaku that the game is still in development on the current breed of consoles, aswell as the DS. As for Aliens RPG - well all the signs indicate that Obsidian are still working on the game. We'll just have to wait for them to come out and talk about it.