Going slightly off-topic here, but if you ask me there hasn't really been a half-decent Bond theme since The World is Not Enough. Madonna's theme for Die Another Day, for instance, was possibly the worst in the history of the franchise. None of the themes for the Daniel Craig era films have been particularly special, largely because they keep going for modern chart acts who, frankly, are not especially talented. With that being said, I'm not sure I can imagine MK writing a Bond theme. I'd be over the moon if he did of course, but I don't think his general writing style would be quite the right fit for Bond.