That Alien model/skin is beautifully detailed, and I don't care what the explanation is, I love that it's so huge.
I do hope the finished product will be considerably more gooey and dribbly, though. And in my opinion, even the first set of teeth shouldn't come out from behind the lips until it's closing in on prey. Think of it as a huge black uncircumcised penis from hell and you can't go wrong.