Iwata had already mentioned Hal was working on a Kirby Wii game in an Iwata's Ask feature. I think it was the one about Epic Yarn.
Moreover, as a rule of thumb, Nintendo's final lineups for Japan are never as bad as what most people think they'll be in 2010. Mario Sports Mix, Epic Yarn and DKC all were announced at E3. Complimentary stuff like Goldeneye, Udraw, Epic Mickey was too.
We already seem to have a couple 500k games for Japan on Wii now - Kirby Wii / Zelda for sure, and I'd reckon Rhythm Heaven could be big too. They just need one more push to offset the FF lift for PS3 at the end. Inazuma Eleven / the April game / niche games of spring from third parties are all nice compliments and Last Story will prevent Wii from dropping below 10k for a few more weeks at least.
People are difficult to govern because they have too much knowledge.
When there are more laws, there are more criminals.
- Lao Tzu
