Well first of all 3.6m forecast is shipped and VGChartz is sold. I believe Nintendo will come out with quarterly numbers at the end of the month so you should wait for that.
They shipped 2.7m Wii-U's last FY so with two major games this year 3.6 million should definitely be possible. Personally is expect sales to be about 3.9 million for the whole FY, just shy of 4 million and slightly beating expectations.







