Seeing as one of Endwalkers major antagonists was
Amon
, this isnt a surprise. The connection to this deep dungeon, Crystal Tower, the Aetherochemical Facility as well as most of Shadowbringers being centred around the Tower as well, it makes perfect sense.

We are finally getting the "bigger picture" on who they are / were, and how the pieces fit together.

Looks like fun.