8 Giant Skylanders: One out-sized Skylander for each of the different elements. These characters have special abilities in-game, but balanced in such a way that they shouldn’t eclipse the original Skylanders. Each of the Giant Skylanders has elements that light up when placed on the Portal and is about twice the size of the original figures.

4 Light Skylanders: Four special edition figures that have light up parts when placed on the Portal. Like the Giant Skylanders, this extends the RFID technology to wirelessly power the figures and avoids the need for batteries.

8 New Skylanders: Eight new normal sized Skylander figures, one for each of the elements. These extend the elemental families with new figures that complement those already available.

24 Re-released Skylanders: Although exact details were less forthcoming on this issue, it seems the plan is to release a fresh set of Skylanders figures in different poses and holding different items to the originals.

Thanks to Jae for the heads up!