Prometheus find a society.....

A comment from Mekja-Tek about 'detachable genitals' in 'Possible Creature Design from Giger's Necronomicon' has made me think about the society of the Engineers which is stated to be disturbing to humanity, darkest corners of the universe, etc. Firstly we know from the trailer (leaked and official): 1. There's a big blue guy 2. There's some sort of white worm 3. There are ampules, but as yet no sign of eggs From interviews we know: 1. The crew meet a society that do horrific and unimaginable things 2. There are xeno like monsters, much bigger 2. There are no xeno's like we see in Alien, but 'progenitors to them'. ....also this is only my thoughts so please just ignore this post if you think I'm trolling, etc....... My thoughts are that the Engineer exist on some sort of joint symbiotic relationship with one or perhaps two other creatures; called it parrasidic, if you like. Firstly we know that the xeno appears to bond with the dna of the host. I am under the belief that the 'progenitor of the xeno' as Scott has said in interviews could be a parasite that joins with a higher organism to create the Engineer? Perhaps the large xeno type creatures which have also been mentioned are like cattle, whom are used as hosts to the 'facehugger' or 'white worm'; the Engineer emerges due to some sort of joint symbiotic relationship. As humans are less evolved and more barbaric the introduction of us into the mix creates the more deadly or malevolent xeno............. Maybe these large xeno's lay the eggs for the facehuggers, which would usually just contain the infant white worm that we have seen a glimse of, and because of the human in the mix the facehugger is created after the mutant human(s) fully evoles into the 'progenitor to the xeno'. I think that the cattle or large xeno creatures are probably limited so thats why the young are stored in ampules - for stasis and to be more secure........ This to me makes sense of an 'inefficient breeding cylce' as it has been referred to many times. The ancient engineers may have started this as an experiment to boost their numbers. Man / Xeno's may cause the destruction of the Engineer's just from the offspring of an accidental mix.......