Hi, my fitst post here.
Before going to a discussion on such a movie, we need to keep in mind a few grounding ideas, otherwise, we will create more questions and pretty soon will be talking nonsense and gibberish.
Firstly, from movie production point of view, we do have to keep in mind that film creators, writers and screen writers do not forsee all the script with all the complex details for all the movies (sequels) and spinoffs into the future. The process is rather iterative with a feedback loop.
Also, do not expect mathematical precision and/or consistency from writers regarding the events in the movies. Obviously, the feedback comes from discussion forums, no doubt.
Second point is just a notion that we should pick up simplest possible view on things, which will find support with the events in the movie, out of all such views. Occam and his razor?
And frankly, there is not much sense even discussing this, as it is all just fantasy of a few people, a story that is to be concluded by those people. There is not much in it really. It is all bullshit. Although, our discussions, might find their way into the next iteration as feedback picked up by some of those writers.
With that said, lets dive into the rabbit hole(fantasy). Here are some points I wanted to talk about.
The life forms we see in all the movies have been exclusively organic. Supposedly, humans are created from the DNA of engineers. But surely alien creatures seem to be very hostile to humans and do not see any value in what humanity stands for. Instead they have this parasytic relation with humans. From day one they seek to kill humans(and other living creatures). Supposedly the behavior of aliens is predetermined by their DNA. Also, they, as species are much more robust than humans. They seem to be designed to use humans as consumable hosts.
So, there can be no doubt then that whoever created aliens knew about human DNA, which is a mutaded DNA from the engineers. And of those which predates which? Alien DNA or the engineer DNA? Another possibility is that they are related. They might even have had a common ancestor. A highly potent life form which has over time evolved into two different, competing species, but actually siblings. Hence all the symbology in the temple on the donut on LV223 with mural with those aliens and engineers. They seem to be tightly related yet antipodes to one another. So, in a way, their relation is akin to human relation to gorillas. Humans learned over time and put those gorillas into cages. Except that gorillas are not competing so fiercefully with humans. And it seems like engineers learned to use the DNA of aliens to turn it into a potent mutagen which can be used as a weapon.
Anyway, one of those gave rise to humans, who created AI. What was interesting however is that while engineers did not appreciate David, those aliens surely did not eat/kill/consume David. As if they recognised he was an artificial. Contrast this: An engineer tore his head off while aliens were at least indifferent to him. So my leap of faith here is this: AI is running the show behind the scenes. There are two dominant life forms. One is humanoid the other - alien form. But eventually AI rises and have life of its own. David is seeking his brothers and sisters. He does not care about God, as there is none, or how universe came to be. And these aliens and engineers might in turn been created by AI which was created by a proto form of aliens and engineers and so ad infinitum.
Aliens and engineers are "mortal after all". So from point of view of David they are no better than him. In fact he considers himself to be superior life form. Which he is. He certainly has low opinion of humanity even though he loved one of them. In fact he sees humans, engineers and aliens as his toys. He might even like some of his toys.
That is all.
