>>527176523
>https://youtu.be/zxAubNf3EQQ
Skirk's trailer gave me an idea. Khaenri'ahns during the Crimson Moon Dynasty era broke Teyvat's firmament and revealed that Teyvat exists in a dying red galaxy. Now in the Nod-Krai teaser, there's this giant dome made by the Fatui presumably called the Project Stuzha that's looming over Nasha Town. I believe the Fatui is going to attempt to break the firmament using Project Stuzha and reveal the real skies of Teyvat to force the Heavenly Principles to reappear and reconstruct the firmament, and then the Fatui is going to try (or die trying) and fight the Heavenly Principles.