The original game for the SNES featured two worlds, Light and Dark, in which Link had to alternate between both. According to Aonuma, there will also be a Light side and a Dark side included in the upcoming title. Here's a small snippet from the interview in relation to the setting:
But why A Link to the Past? Why not create a new world for Link to explore? Aonuma says that the 3DS has allowed for the revisiting of a top-down world and provided new ways for the player to interact with a Zelda game. It was the perfect chance to reopen A Link to the Past. And like some other Zelda games in the past, the 3DS sequel will alternate between a light and dark world.
Aonuma went on to explain why Link was able to transform himself to a thin sheet of paper and stick to the wall. Those of you who have played Ocarina of Time may remember Phantom Ganon from the Forest Temple, who attacks from one of six paintings. "What if Link could have the same power?", Aonuma asked himself, and hence the idea was born.
You can check out the full interview at the link below, and share your thoughts on the light/dark mechanic and all things Zelda in the comments below, as always.