What's the point of no return for WiiU?

[aryu]

criminalnintendo said:

Considering the fact that Mario Kart 8 is already a best seller for gamestop in the U.S, I am pretty happy. I think the Wii U is finally starting to branch out!

How is it a best seller when it isn't even out yet?

 

My answer to the OP:

The point of no return for the Wii U is if sales dip to <100k after SSB and MK8 come out.