I think that Nintendo can stop developing on 3DS for a year, and focus on Wii U, which really lacks games.

3DS will sell well this holiday season, I think it will reach 44-47 million by the end of the year. (two thirds of the DS during the same 3 firs years), approximately 100m lifetime

For Wii U, DKC : TF, SM3DW, and Wind Waker HD will be decisive, I hope they will sell well. If not, it could be difficult for Nintendo...

Nintendo already gave up on the WiiU. 3DS is and will continue to be a huge success.

The next 12 months of wii u will be vital.
3ds will be just fine.

I am afraid of a gamecube scenario lifetime for wii u. But hey gamecube had great games.

and about wii fit?
i think there are ~30 mil people who bought wii fit on wii.
and it will be for free to people who already have a balance board.

along with mario, zelda, dk and sonic, watchdogs, cod...

^ The trial is free but i think the game isn`t, unless you buy the Fit Meter.

The holiday season will make or break the WiiU.

Pokemon will make or break the 3/2DS in the West.