Wii Sports, Wii Fit, Wii Party, New Super Mario Bros. are on the Wii U already.
I saw more Andre Agassi Wii Sports Wii U commercials over the holidays than any other Nintendo commercial in the last 3-4 years.
Wii Sports was a great demo for a NEW CONCEPT in 2006 called motion gaming that virtually no one had experienced before.
But motion gaming isn't anything special anymore, hence Wii Sports no longer has the same catchet on the market.
Wii Fit was also a huge system mover for the Wii, but as we've seen with "Wii Fit 3" (Wii Fit U) ... it hasn't done jack all to move Wii U systems, and Nintendo was even giving it away for free as a demo effectively.
The DS also would not have had anywhere near as much success without Nintendogs and especially Brain Training, but Nintendogs 2 and the latest Brain Training couldn't move the needle on 3DS sales.
