Japanese Taiko blogs have been abuzz with this news just today. I'm linking to a prominent one. We can trust the source this way.
Taiko no Tatsujin Wii 3's full title will be Taiko no Tatsujin Wii Minna de Party Sandaime (太鼓の達人Wii みんなでパーティ☆３代目) which means 'Everyone Party!' in keeping in theme with the rest of the Wii Taiko games. It's scheduled for release on December 2 this year. No official confirmation on Namco's Taiko blog yet or any mention of how many songs there are, but if the previous games were any indication, the total should be at or over 70.
That was sooner than I expected! It's going to be a busy and exciting time for me. Taiko fans, go nuts!
