I dont think it should be based on any one type of music. Zelda is full of all types of environments. From forests, to cities, to fields, to deserts, to oceans.
I think the particular environment of the area should be used to inspire music. I think previous Zelda games did this well.
For example: Gerudo valley's theme (OOT). the very sound of it conveys a hot, sandy desert. and Hyrule Field's theme (OOT) conveys the shear vastness of the area. Kakariko Village's theme (OOT) reminds me of a calm, safe, peaceful village.
Thus, I beleve that the music in a Zelda game should be used to help animate the world, and become part of the environment.