Minor prediction for the NW attack on Craster's Keep: I don't think Locke will be successful in either abducting or killing Bran, nor in killing Jon, or anything like that. I also don't think he'll die in the attack, as that would make the entire storyline of his infiltration of the NW kind of pointless.
Rather, I think what'll happen is that he'll see something that's supernatural, either White Walker related or something to do with Bran's abilities, and end up reporting that info back to Roose Bolton, and him having that information will end up being important at some point later in the story.