I agree that Nintendo needed to avoid a drought at all costs, and having a twelve month period with nothing big has hurt them; but I also think there were two things that hit them where they didn't expect it.
First, Animal Crossing City Folk and WiiMusic failed. Nintendo probably thought these two games could have carried the Wii through that year; Animal Crossing sold 10M on the DS, and WiiMusic was another innovative title in the Wii___ line. If these games had succeeded, then there wouldn't have been a drought, or at least only a small one at the beginning of the year.
Second, third party resistance. Reggie has commented on how upset he is that third parties still don't put their best games on the Wii. Their strategy probably involved putting their best stuff out in the first two years, building such a powerful user base that third parties would have no choice but to migrate, filling in any gaps in Nintendo's lineup; unfortunately, it seems they underestimated the resistance to change.
So yes, having such a gap was a mistake, but it seems that when Nintendo was planning the line-up, they didn't foresee this gap.
Veder Juda is hand crafted from EPIC FAIL, and is a 96% certified Looney; the other 4% is a work in progress.











