The Deacon's Tomb?

So, okay...I'm basing MOST of this on things seen or heard in Alien and Prometheus. When Holloway finds the Deacon/Xeno mural, and says "This is just another tomb." Well, okay. So a tomb of a dead Deacon, in a room full of black goo that genetically modifies organisms? And also contains green-glass-like bottles, like the rock on top of the tomb? Skip to the Engineer drinking the "ancient elixir," the Sacrifice Engineer. Pretty sure he knew what was up. I'm gonna assume it was Earth just because those ARE actual Earth mountains and waterfalls.... Yeah. So then he turns into (nothing or something else???) which then begins to form single-celled organisms, so on and so forth. Skip to the like, 10 A.D or whatever. Engineers are like, "Alright homies let's GTFO- time to go to Earth!" Then all hell breaks loose, and people are running with their Space-Helmets on- I'm gonna assume some must be pilots, yeah? Or maybe just ready to fly. Anyways, some get to the hyper sleep chamber, and there's one homie already in there. Cool- we're all safe! Oopsies- you can clearly see HOLES on top 3 of the 4 hyper sleep chambers in the Engineer sleepy time room. Also, at some point, seems like a ship crashes on another, possibly nearby moon later called LV-426- a ship with a single pilot (at least?? Didn't explore much Kane and D and Lamby), who's chest had a hole in it- "bent outwards," as Dallas says. Skip to ( 2093??) Fifeild and Milburn find the corpses, of dead engineers. Milburn notes, "It's blown open, like it exploded from the inside." You can all see tell-tale holes in the helmets, as if something exploded OUT- or maybe someone got some infamous skull-cracking done by a familiar Alien friend and his little inside mouth. Flash forward to a human, impregnated by someone infected with Goo, gives birth to (Trilobite??) which INPREGNATES an Engineer- who then gives birth to The Deacon. SO. This part becomes speculation, but it formed naturally in my head. The way the Last Engineer strokes David's head, before, you know, giving the SHORT hair cut, makes it seem like David must've MENTIONED, at least, "Oh by the way- in not human, I'm a robot- this old man made me- he's here cause blah blah blah..." I think that, only because, well, the Xeno itself, from Alien- looks all bio-mechanical yes? Like he's half-machine half-organic. Well, you know....yeah. EXACTLY. The Deacon looked very organic, slimy- ALIEN. The Xeno looked Slimpy, organic, alien as SHIT, but also oddly mechanical- with the inner mouth that slid out. And ACID for blood. Hm.... This where I thought, maybe these Engineers killed off, or WORSHIPPED another life form- the Deacon and crew. For some reason, there were no trilobites, and no one could make one. So maybe they thought, if we make another world, with our same DNA, and give it time to "cook," we can somehow get another actual Deacon impregnation. Maybe the "Eggs" and the "Facehugger" were actual bio-mechanical creations- some form of Trilobite/Deacon androids. A biomechanical xenomorph. But a HUMAN, impregnated and giving birth to a trilobite- welcome back to the world, Deacon. After IDK, at least 2000 years?? Probably more. Flash forward to 2153 or whatever Alien took place it- Weyland and bunch knows there's some awesome weapons onboard those derelict juggernaut ships, enter Ripley and Nostromo. That's where my thought ended- maybe the Deacon is a fully organic version, Of the bio-mechanical xenomorph.