Hmm, I think you are putting a lot of faith in 3rd party devs. I don't think we will get any announcements soon from any third party dev in Japan. If there will be any announcemnts as in "big" ones, it will definitely be at this year's TGS or E3, don't count on third parties having anything in store for the Wii soon.
Wii is in for the roughest year yet when it comes to 3rd party support in Japan, but it won't matter because their 1st party efforts will be more than enough to offset them. That is from Q2 onwards.
Proud poster of the 10000th reply at the Official Smash Bros Update Thread.
tag - "I wouldn't trust gamespot, even if it was a live comparison."
Bets with Conegamer:
Pandora's Tower will have an opening week of less than 37k in Japan. (Won!)
Pandora's Tower will sell less than 100k lifetime in Japan.
Stakes: 1 week of avatar control for each one.
