https://us.forums.blizzard.com/en/wow/t/primordial-trolls-confirmed-in-dragonflight/1223763
When Dragonflight was first announced, it was mentioned that we’d be seeing “primordial trolls” on the Dragon Isles. Presumably, these trolls would’ve been half-elementals, thus solidifying trolls as being Azeroth’s only “true” native mortal race.
Elementals were Azeroth’s first inhabitants, and every other humanoid species has been touched by outside forces.
It looks like all traces of the primordial trolls have been scrapped from the expansion, and their traits were incorporated into the Djaradin.
…unless.