@Benga: Easily, the game could sell more than a million on its first week. If you visit the Capcom's forums you will find out that Sven is telling people not to expect this game for at least 1 - 2 more years. So if this indeed comes in 2010, Wii will have a huge userbase by then, probably 12 million in Japan or even more. I'd say close to 2 million 1st month.
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.