While markets worldwide are falling as a result of uncertainty on the Chinese market, there has also been substantial decline in the value of the Nintendo stock (down 5%) in Japan. The reason for this is that Nomura Securities have weighed in with the opionion that NX will cannibalise sales of 3DS and Wii U, as reported by Barron's Asia.
Nomura still expects NX (to be unveiled in June) to launch before the year's end (Q3 in Nintendo's fiscal 2017):
"We had previously thought that the NX launch would have only a limited impact on 3DS and Wii U sales as it is not being positioned as a successor to either console, but we have now altered our view because 3DS sales have been weakening a little recently, particularly in terms of software, as the machine enters its sixth year, and to factor in a harsher competitive climate and what happened to other existing consoles when new machines were launched in the past."