Alternate Universe Alliance and Horde NPCs on the Patch 10.1.5 PTR

wowhead.com:

Several new models have appeared on the Dragonflight Patch 10.1 PTR, featuring the alternate universe forces of the Great Glorious Alliance and the Blood Horde! There are many peculiar things happening within the timelines during Fractures in Time, so we don't actually know where these NPCs are featured just yet. It seems likely that they could be part of the Time-Lost Battlefield encounter between the alternate universe forces within the Dawn of the Infinite mega-dungeon, although the wide breadth of NPCs, as well as the presence of Prisoners of War, suggests they might be part of a larger quest-driven narrative instead. Whether or not it is part of that mega-dungeon battle, the dungeon journal does tell us how it is just one of many battles between the Alliance and the Horde bleeding over into the Timeways, so there could very well be several different variations present at once. These particular NPCS of the characters seen here are also… different than we might expect. The Great Glorious Alliance forces are made up of Inquisitors, Interrogators, and a Sky-Commander, while the Blood Horde NPCs feature gas masks, with names like Smoker, Bomber, and ominous title Warlord of the Toxic Wastes. This suggests that rather than seeing a past battle from Warcraft history, we are experiencing a different timeline altogether — one in which the Alliance and the Horde have taken on entirely different, much darker and more desperate, forms.

This version of the Alliance seems to have embraced themes previously seen within the Scarlet Crusade — implying their fanaticism against the undead, and by extension the Horde, flourished rather than being supplanted by the more tempered Silver Hand and Argent