Interesting read found on GAF:
http://www.nintendo.co.jp/ir/en/stock/meeting/110629qa/04.html
http://www.nintendo.co.jp/ir/en/stock/meeting/110629qa/04.html
Regarding the Wii, the lack of software was extreme only in Japan, and the situation is a little different in the overseas markets but, at first, we thought that time would solve the issues for the Wii just as it had done for the Nintendo DS, but this was not the case. As a result, the software publishers put some effort into creating some titles, but the sales did not reach their expectations on the Wii, which made them think that they could not have high expectations for business on the Wii. At that time, a title called "Monster Hunter Portable" was selling well on Sony's handheld gaming device, PlayStation Portable. Only one title changed the whole momentum of that hardware, and because this all happened at the same time, the software publishers who were considering developing software for the Wii changed their minds and decided to make it for the PlayStation Portable. Because of this, when Nintendo failed to seamlessly provide software, there were no other titles to fill up the gaps.
In that sense, and this is common to both the Nintendo 3DS and the Wii U, we think that it is important to encourage the software publishers to think "This is a platform on which we can perform our business" in the very first stage of the platform. We think it very important to make several hits from the third-party software publishers within the first year from the release of the platform, while offering Nintendo software seamlessly. In order to achieve this goal, we have shared information about the new hardware with the software publishers earlier than we did previously and built a cooperative structure, and we are developing several titles in collaboration with these publishers. I cannot talk in detail about the names of the titles, or with which publishers we are currently collaborating, because we have not announced this information yet, but what we are aiming for with the Nintendo 3DS and the Wii U is, platforms which have much more software and a wider variety of software than the former Nintendo DS or Wii. Therefore, we are thinking of creating an environment where software from other companies will become hits. Please understand that Nintendo is prepared to invest in order to make this a reality.