You think they'd have learned from the abomination that was the Newborn! Stop trying to make new creatures! The existing alien is creepy enough, and there are plenty of exciting or weird things to explore within the existing canon without the deus ex crap-ina that is the black goo. Take for instance eggmorphing. The ecosystem of the hive itself. Some of the comics were very clever in this regard (Genocide, Labyrinth, Rogue). Only Rogue really had to create super-aliens, and even then, it was more interesting that the hot mess that was Prometheus (and the inconsistent Covenant).
You could even explore royal jelly and the Queen Mother, if you thought they were worth examining, without having to add in all this guff about alabaster statue-gods who taught primitive man everything but now hate him and proto-Goth androids who quote Romantic poetry while randomly and wantonly destroying everything in their wake.
