It will require these current achievements:
- Draenor Loremaster - Under Quests > Draenor > "Loremaster of Draenor"
- Assaults - Under Quests > Draenor > "Securing Draenor". If you don't have them you should be able to buy them in your garrison.
- Map Reveals - Under Exploration > "Explore Draenor". Use your feather if you can't find the specific spot.
- 100 Draenor Treasures Found - I don't think the achievement for 100 is in place yet. Use the one under Exploration > Draenor > "Grand Treasure Hunter" and get your count over 100. There are addons to help and of course you can buy map garrison missions from a guy in Ashran.
And it will require "three new Tanaan Jungle reputations to be at Revered.