You know how you said the thing about three areas combined? Maybe they could be three parts of a whole, like the triforce.

Hyrule- Average, main area. Cool characters, main events, etc.
Termina- Darkest, most mysterious, yet fresh.
Other Place- Calmer and lush, but exciting and dangerous.

The three areas contrast each other to make a new experience. Different gods govern the areas, with different people and customs. But they all seem very similar too. You have to explore it all and make connections.

Just an idea, but I guess it could work.

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Anatidaephobia — fear that somewhere, somehow, a duck is watching you.