I know that this will be a very long while before this comes close to happening. But once you've gone through all the worlds, (is that possible?) what will happen? At the very beginning, he said that you may become headmaster. And to prove yourself, you need to show that you have mastered the arts of ,,,,,,,,,,, and all other possible schools. Maybe some ideas are the health he may have, where we will fight him, and much more. Who knows..?