I think that, mixed with the Wrathion quest where he talks about a great threat to Azeroth in the future and shows infernals slamming into the world tells us that the next expansion will be Burning Legion.
Also, Blizzard has said they have plans for Alleria and Turalyon and there has been hints about bringing back Illidan.
Argus (the old home of the Draenei and heart of the legion) will probably be the focus of the expansion.
I want the burning legion mostly because it would be a full circle back to WC 3. While other villains are fine and all,the bruning legion will always be the biggest threat to Azeroth(barring the old gods,but they've been used a lot).
There are a lot of hints towards a Legion expansion, why don't you summarize them in your OP.
Here's a good list of all the many many hints of the Legion coming back soon.
http://www.blizzplanet.com/blog/comm...rn-of-sargeras
If you like my draw-rings. http://yig.deviantart.com/
If you can't find them for some reason beyond that page. http://yig.deviantart.com/gallery/
WOW screenshot and concept art gallery http://smg.photobucket.com/user/evilknick/library/WoW
All signs do point to the battle against the Legion by the Army of Light in the next expansion, but personally I would rather it not be. The seeds are planted in MoP, yes, but I'd like to see more of Kul Tiras, South Seas, and the naga as a focal point. I've said numerous times I'd love to see an expansion with Azshara as the apparent end boss only for the story to unfold with her maneuvering us into a corner and forced to help the naga defeat N'Zoth with the expansion ending not with victory, but with Horde and Alliance narrowly escaping the naga after the Old God's defeat.
I'd love an expansion to wrap up with victory over N'Zoth, but knowing we just set Azshara free to do whatever she wants.
Amidst everything going on, of course add more plot seeds to lead towards the Legion expansion after it, but let all of these hints and teasers gestate a while longer.
Either way, I personally feel like a new Burning Legion themed expansion should be the level 100 cap expansion.
I figured the whole thing with the warlocks coming up was a bigger sign than them saying they're going to do things with dranei. LOL
Q: Will we ever see a model update for bunnies?
A: This is something we are working on at this very moment.
ZOMFG! PROOF OF NAGA-THEMED EXPANSION!
I would definitely love the next expansion to be titled:
World of Warcraft
The Legion's Return
Kil'Jaeden
The Nathrezim
The Pantheon
Sar'geras
and ofcourse the Old God's using this as another attempt to break free, so possibly Vashj
It's pretty damn obvious there are a shit ton of hints for the Legion and Sargeras coming back soon at this point. And any time that happens, the Draenei are going to be front and center, that's a given, next expansion or not.
If you like my draw-rings. http://yig.deviantart.com/
If you can't find them for some reason beyond that page. http://yig.deviantart.com/gallery/
WOW screenshot and concept art gallery http://smg.photobucket.com/user/evilknick/library/WoW
Sounds about right.
So far it has happened like this:
TBC
Northrend
Cataclysm
MOP
The old leaked "fake" list suggested the following:
v Outland Expansion
v Northrend Expansion
v Maelstrom Expansion
v Panda Expansion
? Legion Expansion
Draenei will most likely get some love with Anduin training under Velen. There's probably going to be something in return for the Draenei.
Warlocks new enhanced pets.
I would like to see a burning legion expansion before an azshara expansion, I even think the expansion against Sargeras should be in Azeroth. I think the setup of Legion expansion part 1 (we recruiting new factions to defend in outland), Legion expansion part 2 (sea/azshara) legion expansion part 3 (us defending Azeroth) would be quite cool