The Legend of Zelda: Phantom Hourglass has just been recently announced for the Nintendo DS. The only peice of media avaiable for it right now is a single gameplay video, which can be found here:
Click here for game footage.
The game features a fully 3D, cell shaded world, in the style of The Wind Waker. It's is viewed in an overhead perspective, with the action being on the bottom screen of the DS, and various peices of information (such as dungeon maps) being displayed on the top screen.
The sailing element from The Wind Waker has also returned for Phantom Hourglass, except this time, you drive what appears to be a steamboat. The boat's course is plotted with the pen before setting sail, which leaves you to focus on using the boat's battle mechanisms to defeat sea enemies.
Link also appears to have a fairy accompanied with him, and it looks similar to Navi and Tatl in Ocarina of Time and Majora's Mask.
The footage shows some of the elements expected to be in the game with the technology of the DS. At the start, we see the player solve a puzzle by drawing an hourglass-shaped symbol, and we also see that you can use the pen to draw a path for the boomerang to fly across cross when Link throws it.
The game is really nothing too new in the Zelda series - it isn't exactly the advancement we are anticipating with Twilight Princess. However, Phantom Hourglass is set to be a totally worthy addition to the series. The graphics are sharp, environments sparse, and with the technology of the DS, there's all sorts of innovations to discover.
Phantom Hourglass's release date, and any other general information about the game, is unkown right now.