Because 'Alien Versus Predator' might not have been as good as it should have, but people are kidding themselves when they claim it was never entertaining. We can all do lists of things it didn't do right, but if you're honest with yourself and freshly rewatch it, you'll also be able to come up with lists of stuff it did right, too. Yes, one of those lists will be longer than the other, but that doesn't mean to say the latter won't exist. I've been saying for a long time that this addition is probably going to do some things better and other things worse. That's just how these things tend to be.