VitaTempusN92
Hero of Time! The True Zelda Genius!
If they did have a third overworld in mind, there is nothing saying that it hadn't been planned from the beginning. And if it had been planned from the beginning, then your point about delaying it til 2015 is moot
The point is, the chances of Nintendo having a third overworld in mind, let alone time travel, are very low, considering it would not make sense with the Dark World, maybe with some paradox realm that in which involves time, but not the Dark World which does not involve time.