The Black Prince (Wrathion)

I've looked everywhere I could possibly think of on the internet and could not find out if the quest line for The Black Prince (Wrathion) was in the game. I'm curious because I've got a couple of weapons that have a slot for gems that are acquired only from his quest line. If this is in the game, if I could get a little walkthrough or just a quick explanation on how to start it, I would greatly appreciate it. Thanks!

You can get The Black Prince rep through grinding mobs..as for the quest line,it isn't available in-game yet.

The ledgendary questline won't be in game for a long time as it requires a lot of diffrent content to work (said by Warmane during one of the Q&A's)