Nintendo has confirmed that the Master Quest, a companion to The Legend of Zelda: Ocarina of Time that features new dungeons and puzzles, will be a part of the game's upcoming release for Nintendo 3DS.
The confirmation was made by a Nintendo representative at the 2011 Game Developers Conference, in this video with Conservative New Media. They couldn't get him to give up the game's release date, but this detail is assuredly exciting for longtime fans of the highly acclaimed original.
Ocarina of Time: Master Quest, for the GameCube, was originally given as a pre-order bonus for The Legend of Zelda: The Wind Waker (and a GameCube bundle sold in Walmart.) It uses the same engine and plot of Ocarina of Time, released on the Nintendo 64, but its dungeons and puzzles have been reconfigured.