Definately a South Sea expansion, my version would look like this:
- Playable naga under service of Neptulon, who's still captured by Azshara.
- Azshara and N'Zoth will be the main villains. N'Zoth is the Yogg-Saron/Lei Shen of the expansion with Azshara the final boss.
- Zones like Kul'Tiras, Plunder Isle, The Lost Isles, Nazjatar, Undermine, Tel'Abim, Zul'Dare and other new islands will be added.
- Tinker will be the new class.
- Also some heavy gnome vs goblin moments, they will be the ones introducing the tinker class to the other races.
- The battlemaiden from Vash'Ir will return.
- A new neutral pirate faction will be added, you can earn rep by collecting a lot of treasure for them.
- New feature where you have your own boat.
- Night elves and troll will play a major role, being closely related to the naga and all. Vol'Jin and Tyrande will both be kicking some ass.
And best of all....
- NO THRALL!!!!!!
Okay this is now the best expansion ever.