Disclaimer: The majority of my posts might be dripping in sarcasm. Don't take everything I say literally.
Most people do not realize the talent and skill it requires to be in a top guild. Many of you think its only about time invested, but that couldn't be further from the truth.
The spells already exist in the files, and Xelnath even said they didn't want a "how to..." guide just popping up on wowhead. It seems very likely that, as a questline, it doesn't need public testing and as a major point of lore they don't want too many spoilers out there. It's no different to the rest of the story about the Horde and Alliance landings on Pandaria and huge amounts of speculation that surround the various audio files and texts surrounding them that have been datamined, but not put into any kind of context on the PTR itself. This kind of thing happens all the time, most recently with Theramore's Fall.
It will come, but as has already been leaked, it will be drawn out over the expansion.
I actually bet it has something to do with this post (http://us.battle.net/wow/en/forum/topic/7004697813) and this "Trusted by the Ashtounge" buff you get (http://ptr.wowhead.com/spell=134206)
Maybe a ashtoungue NPC will offer a new quest? Someone get a retail lock that's exalted with the ashtoungue copy their toon to the PTR and find out?
guys let me say something, the other day i did the alliance scenario Lion's Landing on the ptr and there were troll warlock casting fel immolation, so it is defenitly on its way and blizz is just troling us
This green fire will be applied only to destro locks, I presume?
Purple feels like it fits better for afflic anyway. It's all shadowy and stuff.