The engineers are far superior and couldnt control the xeno things, David eventually will also fall victim to this, most likely engineers will come in, and or they or another group of humans will be confronted by the two xeno's made out of Waterston and McBride, because you have to start that movie again shocking, so they will die horribly, two ultimate xenomorphs will spawn, doing a lot of havoc and damage on the humans and engineers, then David threatens the engineers and showing them the 2000 eggs, a human will then probably undermine Davids plans, human dies, engineers try to take the eggs, capture David, merging the a.i. with xeno stuff, David falls victim to a higher force as he becomes the experimented one, and finally the xeno is born out of David.