...on buying the boxed sets that are out just now? Because when AvP2 comes out, Fox will no dought bring out boxed sets like:
The AvP Collection (Alien vs Predator and Aliens vs Predator)
The Predator Experience (Predator, Predator 2, AvP, AvP2
The Alien Experience (Alien, Aliens, Alien3, Alien Resurrection, AvP, AvP2
Aliens vs Predator: Denfinitive Edition
...and if and when a third comes out they'll do the same again...