I don't think it needs one either, personally. Most dungeons in zelda games don't have a hook. Except WW... I remember the wind dungeon place having that cool steel guitar hook(Was that the hook? I can't remember...).
But WW was more playful and well... cell shaded. You could do that, I guess, if your making it cell shaded. But from the sound of the song, it sounds more dark and gloomy, like TP or OOT.