Obviously Big Ugly is an interesting xenomorph... with a weird colored head that looks more like skin is stretched over the warrior's head, and some weird crest like thing, and since we know Dr.Hollis is hosting a queen burster, what if Big Ugly is said buster, but altered into a "sterilized" queen, like a half-queen burster half-normal adult xenomorph? Yeah, it sounds crazy, but these descriptions give it away "
#8
Keeping a baby Xenomorph alive, even in a frozen state, contradicts all the survival instincts that Zula and Hollis have...#9
...They try to keep it together, but an attack on the Europa by space pirates forces the trio to weaponize what they seek to destroy.#10
An attack on the Europa by space pirates leaves Zula, Davis, and Hollis on a barely functional ship. They now must return to Earth...so it obviously means they keep the queen burster alive, but hate doing so, but later are forced to weaponize what they hate for their own safety.This is where Big Ugly comes in. For starters, look at this one image:
Notice the stretched skin and the weird side bumps, as well as the small crest, as well as the blue Earth oceans in the bottom right
...now look at this queen burster statue:
it definitely looks like the head of the queen burster attached to a normal xenomorph, but the head spines of a normal adult warrior are developing under the skin, like its some incorrectly developed mutant, as a result from Davis and Dr. Hollis messing with it, to find a way to quickly weaponize it, so the possibly activated the "normal" xenomorph gene, since they grow faster, and because they don't want a queen laying eggs to deal with later, so they go for some quasi-queen thing instead, so its both powerful and has influence over the other xenos to help kill the space pirates, but the grows much quicker and won't lay eggs nonstop, and will be easier to kill later than a true queen would be, the best of both worlds.
In regards to the oceans, that's just to show Big Ugly isn't in a flashback, but rather present as the trio are forced to return to Earth.