Blizzard has released a really good trailer for Warlords of Draenor! Check it out below:
Quote from: Blizzard
Beyond the Dark Portal, clouds of war grow ever darker. It’s up to the heroes of Azeroth to put a stop to the Iron Horde before they renew their efforts to invade Azeroth. Watch the new Age of Iron Trailer now and prepare to take your place on the front lines.