Regarding the Absolute. Is it an actual entity? Is it the dead three? Is it an illithid elder brain? Lot of questions. Too little to go on.
Hard to tell so far exactly because of so little to go on.
The dead mindflayer shows us a vision of other mindflayers standing in a
serene circle in
absolute unity. I believe there is someone or something standing in the very middle of their circle, acting as an amplifier to their psyonic powers or using the mindflayers to amplify its own power.
In any case, it shows the world ending with thousands of Nautiloids pouring out of the void, but I believe it may be a false promise made to them by the being standing in the middle. I think they may have joined the Absolute with the intent to restore the Illithid Empire, but the Absolute has a completely different plan than the ones the mindflayers imagine and is just using them for now.
