Fourth Spec...ulation

Who cares about this dusty ol' Mists of Yesterdaria, lets talk about the next expansion! Why, you ask? Because I saw this. It's supposedly a "leaked" image from Blizzard, an internal mock-up not meant for the eyes of the public. I'm 99% sure it's a fake, but seeing it has got me thinking about the next expansion. What's the big feature going to be? Well, this rogue is hoping it's fourth spec.