引用元:
Shippuu
There's zero hints to the vast majority of things added in expansions. Where's the rule that everything has to have some hint to being added? Where was the hint of the Vath, Vanu Vanu, Kojin, Ananta, Namazu, Nu Mou, Pixies, Dwarves? These are all new races added to the game out of no-where with zero hints or clues leading up to them until they were straight up announced (in before they're somehow different because they're beast tribes).
Au Ra were implemented with a complete lack of lore and a complete lack of actual integration. All we had for them was that Yugiri was one and they were from the Far East (and a small mention in the Wind-Up Odin flavor text), and Sidurgu was from a group that came to Eorzea and got wiped out by Ishgardians. The majority of Au Ra lore for Heavensward came from Koji's naming convention post on the forums. We didn't get any kind of actual integration for Au Ra until the expansion AFTER Heavensward. A new unannounced race could be no different. We come across stuff all the time that hadn't existed to us before but the setting acts like they've been around the whole time.