Alongside many updates coming in Dragonflight Patch 10.1.5, there appears to be a new Dragonriding mount in the works! The Grotto Netherwing Drake would appear to be part of the Netherwing faction of Outland — an unusual brood spawned from black dragon eggs infused with the raw nether-energies of Outland. During The Burning Crusade expansion, players were able to ally themselves with the drakes, eventually earning the right to ride them.
A Netherwing Drake may seem like an odd choice for the next Dragonriding mount, but it closely follows the discovery of new Dragonriding races in Outland datamined in last week's PTR update, making it very likely the two are connected. Similar to the Kalimdor Cup, which adds Dragonriding races throughout the old world continent of Kalimdor, this kind of limited old world flying is likely being used as a way to test Dragonriding in the Old World before it becomes a game-wide feature.
The Swift Nether Drake is one of several unobtainable TBC Gladiator mounts, which gives us an idea of what Dragonriding customizations could look like. As Blizzard clarified that these features were still very much a work in progress and would not be complete until much later in Dragonflight, it's possible we won't be seeing Outland dragonriding races or the Grotto Netherwing Drake anytime soon, but the possibilities of new mounts and customizations are always exciting!
Good day dragonriders,As data-miners have guessed, we are indeed working on dragonriding outside of the Dragon Isles and broadening the set of mounts that can dragonride. Read more on wowhead.com