At a presentation with investors, Nintendo revealed their next title in the Wii series — Wii Party. Not much was said aside from the obvious use of Miis in the screen shots you can see after the jump. Iwata compared the game to Mario Party 8, which released in 2007. It is unknown exaclty how similar it will be to the Mario Party series.
All we know that there are Miis, Mini-Games, and Party in the title.
The title will be out some time before March 2011 in Japan.