Quote Originally Posted by Golden Yak View Post
Farahlon has been hinted at in some of the garrison shipyard missions, but no word on whether or not we'll personally get to go there.

Gul'dan doesn't appear to die in any of the encounters next patch, as far as I can tell. There's definitely room for another tier of content, it depends on whether Blizzard wants to develop it or not, or focus on getting the next expansion out.

Perosnally, I'm hoping for a 3rd raid tier involving the Infinite Dragonflight and more alternate timeline shenanigans.
Go watch the 2014 Blizzcon panel. Stockton addresses Farahlon - "We'd like to do it, if we have time".

Make of that what you will, but as of right now, it's not in the game. They made a purposeful decision to remove it, because of time constraints - and that was last year.