Blizzard dropped several in-game cinematics a few moments ago and it seems like they are going all out on this expansion in terms of story telling as far as I can see. I won't spoil much about the in-game videos since they contain heavy spoilers with deaths of several prominent characters which makes me wonder if World of Warcraft has been inspired from Game of Thrones' story telling skills.
Blizzard Entertainment has announced the opening of beta registrations for “World of Warcraft: The War Within,” inviting players to explore new subterranean worlds beneath Azeroth.
Danish from eXputer: "Despite Blizzard's attempt to give a fresh new spin to World of Warcraft, some fans still seem to be stuck in the past."
HG writes: "Blizzard is usually pretty bad at keeping secrets, but the company somehow managed to keep this one under wraps until now. Plunderstorm is a special limited-time event that’s basically World of Warcraft’s take on the Battle Royale genre."