Another list of a couple thread i found worth adding.
While this thread is rather small i think it could work should Blizzard ever decide to expand on the Rajani and want to treat them like the Pandaren.
However in my opinion this should be more of a cosmetic nature for the Dracthyr instead of an entre new race.
The same goes for the Broken. More of a cosmetic nature for those that want to RP as a broken that was welcomed by their brethren on Azeroth or roleplay as some forgotten remnant of argus.