New theory on Chet/Predalien. If I have to accept him as a "Young Queen", here's my explanation; Chet was a Xenomorph Alate.
It's worth noting that Xenomorph aren't bugs. But the comparison has been made time and time again to hive insects. They have a Queen and even Hudson and Bishop compared them to social insects. Hudson said "like an ant hive" but I disagree. I'm an exterminater (every day is a bug hunt) and Aliens always reminded me of termites. Termite Queens develop the large distended Eggsack that inspired the xenomorph queen's eggsack, they use thier spittle as resin in the construction of elaborate nests, they have smoothe heads with no eyes and the soldier castes can even spit an acidic liquid at ememies. There are 5 castes of termite that you could compare to the xenomorph:
Alates [Praetorian/Young Queen]: These are young winged, fertile adults that emerge from an established termite colony to spread out and start new colonies. After mating and losing it's wings,the alate will lay several eggs that will hatch into workers to start the nest before the Alate molts into a queen and becomes immoblile. The Alate cannot produce eggs again until it molts into a Queen and forms it's eggsack. This caste seems to suit the Praetorian/Young queen theory on Chet. Perhaps before devoloping into a Queen, a Praetorian/Young Queen has a limited number of fast developing embryos she can implant via mouth to quickly create a small swarm of Warriors to protect her and secure a location to build her nest (perhaps Chet exhuasted her embryos in the maternity ward and was having the Warriors hive the hospitol so she could molt into a Queen). Maybe she can only molt into a queen after dispersing the embryos and securing a nest location. The Royal facehugger had the ability to implant a Runner to watch over the Queen Chestburster during development, the Praetorian/Young Queen may come with a similar defense to create Warriors. Plus, Chet has already been identified as a young Queen and his head resembles the praetorians (which were young queens) from the video games. Gotta be an Alate.
Queen:This one is obvious.
King: Not sure what a king termite would compare to in a Xenomorph Hive. So screw him, this is complicated enough already....
Worker [Drone]: The Queen termite's first brood will always be a brood of workers. If we compare workers to smoothe-headed Drones, it seems to make sense that Drones appeared when a new nest was started by a Queen as we saw in Alien Res and AVP. Those were new nests that had not yet been established.The Nest in Aliens would have been what we call an established nest.
Soldier [Warrior]: These termites resemble workers but have enlarged heads and jaws. They are only found in well established termite colonies that have been around for a while, but are born the same way as workers. I consider the ridge-headed Warrior alien to be the Xenomorph version of a Soldier. They only appeared in a hive that had time to be well established (on LV-426). The age molt theory is plausible, it's possible Drones could molt into Warriors as the hive matured.
I know they're not bugs, but still, makes sense yes?