While this is encrypted, and not able to be datamined, this may indicate that Blizzard is ready to push Patch 10.1.5 to the PTR shortly after Embers of Neltharion goes live.
Based on the 2023 Roadmap, we know that a megadungeon is planned for 10.1.5, and yesterday we also got some hints dropped about future Bronze Dragonflight story lines in a WoWCast Developer Chat with Morgan Day and Maria Hamilton.
What do you hope to see in Patch 10.1.5?
