bet will be 2017 or even 2018 since iwata should have learned by now that releasing a console without the appropiate launch titles and a good marketing support is an overkill, not to mention that according to betsheda nintendo approached them very late in the console development period and they didnt exactly approached to listen to their demands which creates insecurity and with this experience iwata should know by now another reason why third parties skip their console
plus, the new console should be attractive to the general public like the wii was, the wii u gamepad just doesnt appeal to the eye of common people and even if offers better experience it wont matter as long as people dont get the idea behind this new periferic
in short, nintendo cannot release their new console to soon as they risk to fail again if they are not prepared, not to mention that if the current generation is still strong then the new console will have low chances to become a suceesss, is not good idea to force a new generation, nintendo must wait until the current one starts to sow down and people get tired of it
