Now we're cookin'. Bran learned to control wolves, then Bran learned to control Hodor, and that's all before meeting the Three-Eyed Raven who's hopefully been teaching him a trick or two in the season-long break they enjoyed. The logical next step is a more complex human than poor old Hodor (Meera Reed?) and beyond that, the scale can only grow. What's the largest creature in the world? Well, I hear that Targaryen's got a few dragons flying around. The situation is unclear, and it all depends on a wide range of circumstances to draw Daenerys and Bran closer to each other, but could Bran rise to such immense power that he could control a dragon for or against her?