In today's press conference, where the company detailed its plans to make mobile games with DeNA, it also teased a new system codenamed "NX." Few details were disclosed, other than it'll involve fresh hardware and a new gameplay concept. The NX symbol appeared on a slide alongside the Nintendo Wii U, 3DS and other mobile platforms, which suggests it could be a complimentary device, rather than a straight successor to either its current home console or handhelds.
Source"As proof that Nintendo maintains strong enthusiasm for the dedicated game system business, let me confirm that Nintendo is currently developing a dedicated game platform with a brand-new concept under the development codename 'NX,'" he says.