Could Neomorphs have existed previously? If so...

IndyFront
MemberFacehuggerJun-27-2017 2:00 PMWe obviously do not know much of anything about the Neomorphs other than how they reproduce. We do know they are spawned by motes that emerge from egg sacs that evolved from the accelerant, such entities resembling miniature Ovomorphs that can enter the body through cavities besides the mouth and esophagus.
So, the accelerant essentially produces proto-eggs and proto-huggers that produce these "Neomorphs". Here's an idea; what if the "Neomorphs" were encountered a previous time the accelerant went rogue, only the initial encounter by the Engineers was much more catastrophic and apocalyptic. Think; the Engineers once ruled an empire that spanned the galaxy, and many others, before being reduced to one major settlement on Planet 4. This particular outbreak resulted in the same thing happening as happened on Planet 4 (sans David) only on a much (MUCH) grander scale. This would explain why they were not suspecting it to threaten them again, let alone at the hands of something like David.
It would also explain why they had a particular ability to hide entire planets. Why? Because, this particular outbreak grew beyond control, they had to isolate the stabilized specimens from the major quarantine zone (planet), and the outbreak respectively had to be isolated itself. Unlike the post-Outbreak accelerant, this initial 'prototype' could not only affect fauna, but flora and fungi and bacteria as well. In fact, it could assimilate an entire ecosystem into its framework. Hence, why it grew so rapidly out of control so quickly (even for the Engineers). Since the Engineers we see in Prometheus had advanced biotechnology patently different (At least aesthetically) from the more conventional technology and architecture of those of Covenant, this is due (in theory) to some deciding to carry on with the biotechnology utilization after the outbreak, and others recoiling in horror at what happened when the accelerant got hold of the "bio" part of that technology, corrupting it. But I digress.
Inevitably, the Neomorphs would result from this larger outbreak that ultimately had to be contained within a pocket dimension. Nevertheless, the corrupted Engineers would survive, preserved by the strands of corrupted ecosystem and biotechnology that managed to escape and endure within the corruption of their psyches for millions of years, but would ultimately kill most of themselves off due to insanity. The salvation would relocate to a more primitive lifestyle on Planet 4, isolated from the world, and ultimately sterilized due to exposure to the pathogen. But, while all of this was going on for millions of years, the isolated ecosystem on Marduk thrived, and evolved.
Sorry for the long-winded diatribe, but I simultaneously wanted to make a meaningful contribution to the forum with my first thread, and provide a fleshed-out background to my theory and/or question. So, say these Neomorphs existed at one point in the ancient past. If they were isolated/quarantined for eons, wouldn't they and this rogue ecosystem they inhabit evolve? And if so, would they evolve into something reminiscent of a Xenomorph Hive?
For example, a side-by-side comparison of two species of "Xenomorphic" beings:
So we have some fan art. I used the Covenant "Protomorph" as something to compare an original design next to. Would the Neomorph evolve into a different 'strain' of "Xenomorphism"? For example, the one on the right is less insectile, and incorporated elements of the rogue biotechnology (Described above) into its genetic makeup as it naturally fused with the rogue environment over a long period of evolution. But it is quite clearly more abominable and beastly in appearance insofar as its exaggerated anatomy (hands are massive compared to the Protomorph, and it is larger. And uglier.)
(Edit, sorry for the crap quality. It was a small image as it was part of a storyboard I pulled it from).