It's been a while since we saw these guys, right?
As time has gone by after the exodus reports, I have been slowly filling some gaps about the Ancestrals lore and his connection with Adam.
For Starters, the ancestral evolved quickly as they came into contact with Adam, they went from wild animals to advanced sages in a blip compared to the natural evolution of other species. Adam divided the Ancestrals into 2 species, the dark holders and the light-bringers (just like the ixim and the humans).
The dark holders formed 80% of the ancestral population, and these had access to magh thanks to Adam's direct influence in their evolution. At the same time, the Lightbringers were raised apart from the darkholders and never given the ability or knowledge to use magh. This was intentional, Adam knows light is a principle of change and primordial light can be unpredictable, so the light-bringers must not become aware of their power nor find ways to use it, if they do they can put Adam's system in danger. The Lightbringer were always in controlled spaces, and to the eyes of the majority, they were treated favorably by their god, so envy was a common sentiment towards them, but they were nothing but sacrificial lambs and their spares, all of them.
Ancestral venerated Adam as their god, which isn't a false claim to make since thanks to him they became what they are now, but it was a matter of time before they started suspecting the ulterior motives of their creator. They were raised in a culture in which sacrifice was normalized, something necessary to ensure the future not only of them but the universe, and while part of that is true, as the number of sacrifices got faster and increased to alarming levels, the ancestral started to get worried their god might not have their wellbeing into account. Of course "ascending was seen as an honor but, some of the ancestors couldn't help but question the nature of this system, and those where the ones who discovered the whole truth.
It is still unknown to me how they got to the truth but, maybe they were so advanced in their use of Magh that they could see fragments of the past, or the future, to a lesser level compared to their creator, visions beyond comprehension triggered by Adamic crystals, created by the landing of Adam in their planet and conserved as important relics. The tesseract crystal may have time and history encrypted in it, which with the right knowledge would make the information accessible. They could be just Adam's memories in the crystal or from those that formed part of him from similar civilizations as the ancestral, there are many possibilities.
The Ancestral discovered the end goal and couldn't let it happen so they started creating Tartarus to negate the Tree of Life and imprison Adam, sadly it was too late by the point Tartarus sealed the dark god, the Universe 89X vanished. It is possible that a few Ancestral got locked in Tartarus and are sleeping in Cryogenic pods waiting to wake up and become the guardians of the dead moon. Sadly if that's the case, I think most of them would have died, Adam might be sealed but his power and influence can transcend, he might have found a way to damage the cryogenic pods, especially if they use Adamic to code their technology.
Why am I leaving this ambiguous end for them? Cuz I'm considering the idea of one ancestral waking up while Asher and company visit it, and giving them exposition (Steve is back bitches) although the ancestral will not last longer, Syzygy might probably kill it.
Anyway, that was longer than I expected. Hope you enjoy the extra lore.