"Survival" is the name of the horror movie genre these days. There is no triumph, no hero. Only people who make smart and/or lucky choices and live to see another day. It is this way too with AvP2. A Predator ship carrying Alien facehuggers has a nasty Alien-induced accident and crashes on Earth. This is the Earth of today, a semi-large town, populated with ordinary people with ordinary concerns. We haven't a chance against the specialized hunting skills of the escaped Aliens and the one horrid "Predalien" that emerges from the wreckage.
A single Predator arrives to take care of the mess. Between June and me, we can't decide if the Predator is of the Hero class, or the Janitor class. Whichever, the lone Predator is quite capable of taking on the Alien infestation and taking out any human being careless enough to get in the line of fire.
And all the townfolk can do is to run, scream, cry and die senselessly and unpredictably. With everyone equal in misery, no one deserves their deaths, helpless in the disaster that befalls them. I'm pretty sure the Predalien crossed an unwritten line that horror movie monsters have not crossed before: don't mess with newborns and expectant mothers. The atrocity it commits in the maternity ward is the stuff of nightmares.
No one's a hero. There is no avoiding an Acheh tsunami, a Katrina hurricane, a Malibu wildfire. There are only survivors and casualties. In these days, we're beginning to recognize how helpless we are against nature's wrath. Yup, it's time to give nature back the respect she deserves.