A lot of it has to do with the fact that Nintendo is not really doing any press conferences for their titles again. There will be some announcements, but they aren't going to be using the big stage like Microsoft and Sony will be.
All of the focus of Nintendo has been on the "failure" of the Wii U. Yes it may not have sold well, but the company has two consoles it is selling right now. The 3DS has remained the top selling console for quite a while now. I do not see how Nintendo needs to worry about the Wii U when, even with the price cut, the 3DS is outselling Sony and Microsoft.