Those Zelda games are pretty hot stuff. So hot, in fact, that Nintendo is planning on making another one. Imagine that!
Speaking with Portuguese game site My Games, Zelda series producer Eiji Aonuma said:
We are already preparing a new game, a game in the series for the Nintendo 3DS, but don't think that it is a direct sequel to the Zelda titles released on DS. We are talking about a new game, but it takes much of what has been done on previous handhelds.
Oh? Could this be the fruits of Operation Moonfall, the movement to have Majora's Mask remade on the 3DS? Although Aonuma and Shigeru Miyamoto have considered the idea, neither think it's right to jump onto another remake so soon. This new game will be an original adventure, and it sounds like it will be stylistically different from the Zelda games on DS.
Aaaaaand that's all for now. Get to speculating!