As it has been about 14 years since the last real console Adventure Island game this is good news indeed! We wonder if Hudson will copy Capcom and make the game entirely 8-bit?
Hudson has also said they have a yet to be revealed puzzle/action game in development, which might use the Balance Board. We personally think this is Tetris Party, which fits the criteria and has yet to be "officially" announced by Hudson.
Source: Wii Fanboy