Personally, I think hype on the level of the Wii is over-rated and not necessarily ideal ...
Neither the 3DS nor the DS started off as strongly as the Wii did, and it is difficult to claim that either platform is really suffering from it. These platforms have been so successful because they steadily increased interest in their platform and interest peaked in the third/fourth year when production could meet demand; and this was driven primarily because the libraries steadily improved both from strong first and third party releases.
Launching first gives Nintendo a huge advantage but doesn't mean that they need to sell an extreme amount of systems in the first year. At this point in time unless the Wii U "flops" it will see decent support in year 2 because the risk associated with next generation development will likely translate into developers reducing risk by releasing games across as many platforms as possible (XBox 360, PS3, Wii U, PS4, XBox 720). What this means is year 1 for Nintendo is mostly about securing support for years 3 and 4; and year 2 will mostly be about securing support for years 4 and 5.
In my opinion, Nintendo's focus has to be on selling between 10 and 12 million units in their first year, and then selling 12 to 15 million units in year 2. From there their plan really will have to adjust to what Microsoft and Sony do.







