Tough call. First and foremost will depend on how many are shipped first week, and Nintendo has never been huge about shipping more than a million first week.
Secondly region breakdown is important. Smash Bros has never sold particularly well in the Others regions, mainly due to a Nintendo console has never really been that popular in that area. With things different this generation in that aspect I think we'll see smash bros do a lot better in that area.
In Japan I expect larger sales as well simply due to larger userbase, and a country that is 100% behind anything Nintendo. And America, being where this game is completely dominant at, we'll see some pretty damn good sales. So based off all of this, hype, marketing, and noting that this is not only the biggest game of early 2008, but the biggest Wii game to release:
NA: 1000k
E/O: 700k
Japan: 600k
Total 1st Week: 2.3 million
I'll probably end up to high with the American prediction due to Nintendo not shipping that much, but the game has no competition when it releases from anything, and Wii will have a pretty sustainable userbase. I expect lifetime this tittle to sell well over 10 million.
