From what I can get at is your idea is to have a Zelda game where the "light world" has a toony style, while the "dark world" has a realistic style? I like that idea, though there is something that nintendo would have to think about when it would come to doing that. That being have a way of...
Skipper turned around and saw Keneth. "Zzzt Same here." Skipper looked back at the castle, then back at Keneth. "you should go ahead of me, Ryoko is there alone, and I doubt he's out of trouble. He needs help probably. Zzzt.."