Let's look at this logically. Wii U will still be around 13 million, Wii sold 10 and PS4 sold 12 million it's first year (which are some of the most successful console first year launches), so we can imagine even if it is a huge success and people are just busting down the gates to get it in it's first year when Zelda U will probably be its most successful it will only have an install base of 25 million. Out of that you expect 10 million copies of a game to be sold? While not impossible (literally every single person who owns a console COULD possibly buy it) you see how far of a shot this actually is.
That would be to expect 1 out of every 2.5 people to own this game.... It's not likely at all. With an install base 20 million users more and a game that was hyped to hell (which was the case with TP) it only sold around 8 million. You would be hard pressed to have me believe this game is more anticipated than TP too.
I'm actually thinking I was a bit to optimistic saying 7-8, and 4-6 million will probably be far closer.
Just some perspective.
