Battle Pets That Drop In Old WoW Raids Mists of Pandaria - Murlocs.com - World of Warcraft Community and Guild
Personally I think it'd be cool to bring back old raid instances and re-use the ones with wings as a version of Mythic+/Mega dungeon with a rotation per season. *Removing certain mechanics
Tiny Terrors in Tanaan: 6.2 Legendary Pet Battles - Guides - Wowhead