We already knew UFC fighter Ronda Rousey plays World of Warcraft sometimes (as a Night Elf Hunter), and the fact that the folks at Blizzard love Easter eggs, so seeing a small in-game tribute to her is really no surprise. But it's still pretty cool! Her in-game alter ego is a human Monk, called Rhonda, and she's hanging around the alpha build's Monk Class Hall. Can't miss her.
Blizzplanet's clip shows her exact location and features another in-game version of a famous WoW player: Mina Kunis aka Mila Kunis. This character was already in the game though, as a Garrison follower, she just moved to a new location in Legion.