I'm curious how you come to this conclusion after the two month launch window. Jan-Mar will be pretty miserable due to lack of new software but April-June has an opportunity to be pretty decent.
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Iwata said that they're showing off 3D Mario, Smash Bros, Mario Kart, and Wii U Party (or w/e the Mario Party successor is called) at E3, which is in June.
That pretty much kills the chances of any major Nintendo release until the fall or winter.
Aside from the stuff that has already been announced, which isn't going to push systems (Bayo 2, Pikmin 3, W101). Feel free to quote this and ridicule me in six months, but regardless of the quality of those games, they just aren't system sellers.
Look at the Wii's best selling titles. Most of them are party games, mixed with a few Mario titles.
When was that?
When they cut into the dev time for WW that was ridiculed for its art style?
When they delayed the shit out of Zelda TP?
When they released Fire Emblem because they had nothing else to release or in the long drought when nothing at all was relased?
When they made Metroid Prime. When they signed a deal for exclusivity for Resident Evil 4 and REmake. When they made F-Zero GX. When they took a gamble on Wind Waker, when they made Super Smash Bros Melee, when they tried to get Metal Gear to finally cross over from PlayStation. When they took a gamble on Mario w/ Sunshine. When they created new IPs: Pikmin, Animal Crossing.
The point is, they tried.