My thread from a year and a half ago came back up and since I've moved house and forgotten my password since then I came here just to clear the stuff up. Back when I posted the Blizzcon 2013 leak it was because one of my friends who works at the Versailles office asked me to go to some kind of "party" at a bar and a lot of his friends actually didn't mind telling me a few things which would happen at Blizzcon.
Anyway, my friend still works in the Versailles office and since I've seen all these leaks around I asked him if any of them happened to be true and my conversation with him got me this information:
- Nothing has been leaked about the next World of Warcraft Expansion yet (Yes, all the leaks on this site are fake).
- It will be announced in November at Blizzcon.
- There is no known release date, but they want to coincide it with the movie for players.
- He is strictly forbidden from releasing any information, no matter how much I asked he did not spill.
TL DR: None of the leaks are true, expect announcement at Blizzcon, expect release around the time of the movie.