It is still difficult, reception was and is terrific, but this isn't the first Zelda that was recieved well. And both Ocarina of Time and Twilight Princess didn't make it. The games sell fairly consistently, and console install bases seemed to have only had a mild effect on sales. You can always count on around 5m as that seems to be the average for the big console entries throughout the series, and the Zelda cycle says that this should be one of the better selling ones (will be the first game on a new console), so 7-8m could be doable. 1.5-2m on WiiU, the rest NX.
I do hope I'm being conservative though, and this will finally be the one to break 10m.







