The next stage in the Alien evoultion?

Ok think I may have figured out were the Alien franchise is going go with the Alien's evolution.  To quote Vickers from Prometheus "A King has his reign, and then he dies".  David will fall prey to this statement, as his creations will eventually turn against him.  I guessing he will succumbed to a face hugger, and this is were the mechanical look to the Alien will be introduced, giving us the bio-mechanical look for Alien.