Yes I will agree the Wii U hasn't gotten that post-launch wave of Nintendo IP, which you can kind of think of as "puberty" for a Nintendo platform (lol).
That said, maybe a lot of people are hinging an awful lot of hope on the same old franchises doing everything.
The 3DS by now has more than sufficient "Nintendo franchise cred" yet it's keeping up with its yearly pace rather than accelerating.
I think what's happening with the 3DS is the stronger library year over year is actually masking the fact that they're are bleeding potential users to tablets/smartphones at the same time. So their lineup is getting better and they have more hardware options (XL + regular model) but it's showing no increase year over year mostly because these positive changes are been offset by negative ones (ie: the rise of cheapo $200 Android tablets).
Nintendo needs to a new Brain Training type hit more than even a new Pokemon or Mario game.
Because if the 3DS is struggling to get over 130k with all the franchise games it has and an $80 price drop and a second model revision, added to the fact that Nintendo handhelds traditionally sell better than their consoles (post-SNES era), the Wii U baseline for a month like this when it actually gets games may be in the 70k-100k range (factoring in Mario 3D + Mario Kart U + Pikmin 3 etc. etc.). That's not very good.
