You can tell when people have turned being a fan into a RELIGION, when they are obsessed with "canon".
Put a few new Alien monsters into a video game, and everyone screams "HERESY".
I'll just have fun:
Exploring the wreckage on LV-426.
Shooting new monsters, and discovering the new types of Aliens. Maybe they will even have the Engineers make an appearance?
Being ripped appart by new monsters. All sorts of new horrific ways to make you toss your controller at the floor.
Going through a ton of ammo trying to Kill the Empress/King/Hermaphrotide - er, whatever the **** it is Kaiju Alien Final Boss.
I don't care if it's forever condemned to Expanded Universe.
Heresy!