As i said before, it will be an interesting battle.
My points on Wii:
1) Wii is getting at saturation point in Japan, since it doesn`t have support with big japanese 3rd party titles. Monster Hunter 3tri was more like exception.
2) The Wii already was affordable, and 50k yen pricecut shouldn`t help that much. I expect Wii sales around 50-70k that week, realistic maximum.
3) Wii Fit plus, just like Wii sport resort, which had no effect on sales.
4) Yeah, New SMB will have effect on sales, just like FFXIII will. But you never know, which one will have bigger effect.
5) There was already Tales game on Wii and FF spinoff probably will sell same as Tekken 6.
My point on PS3:
1) PS3 got slim version + 29,9k price, ps3 became now affordable.
2) First really big game on PS3 - FFXIII. Wii already had SMG, SSBB, MK and other.
3) PS3 is getting more JRPG games lately.
4) PS3 has enough games which rivals Wii lineup in Japan this year.
5) And if both consoles won`t reach their goals till March, PS3 will have support from GT5.