Early Nazjatar & N'Zoth Leak?

In PTR, an intriguing map appeared in the game files, simply called "NZoth". What can be seen there is a very early and smaller version of Nazjatar, containing mostly placeholder models. This map also hosts the body of N'Zoth modelled as terrain. Based on the fact that both parts of the map aren't even near completion, they were most likely published by mistake, and were created with perhaps different story of the zone in mind. Enjoy!