Ku hu hu. Oh you'll see plenty (not reall) of him! Ku hu hu.
Actually, noq that you mention it, I was planning a boss for you near the very end. He's optional and a bit cheap (you can guess why), and you'll need to be VERY quick to strike him down before he unloads and inevitably kills you.
That one battle will be more dependant on your equipment more than anything else, though.