He's talking about Alien 5. To be honest, at the time, the very thought of an Aliens versus Predator movie was something a lot of people were waiting for a long time, so the news of AvP probably sparked more interest. After all, you get both Alien and Predator fans. That and it potentially got the predator fans to watch the alien movies (like me) and vice versa with all their milking before the movie was out. Of course when it came out, it turned out to be not so good.
Anyway, I'm sure not even Ridley Scott can create an AvP movie with substance. The entire premise screams actionfest, which is what we're getting.