So the Predalien is a rapist-nifty idea.
Well, it was pretty much the trainwreck that we all thought it was going to be, but I don't think anyone here expected more than such.
A few gripes about the movie other than its existence: the movie really dragged in the beginning before anything important happened, aliens and predators are reduced to "monsters in bushes," as opposed to the ominous, magnificent creatures in past movies, the Weyland Yutani element was needlessly re-introduced, about 2 seconds long and thus totally unnecessary. I can't or don't really care to think of much more.
"AvP" is gene-spliced with "I know what you did last summer, Scream, etc" and that sums up this addition to the franchise...