I am very skeptical that bundles made up more than 2-3 hundred thousand units, which would put Prime still well above any game in the series other than the original.
Reggie said he expected it to break the 1.5-2 million bar, and the interviewer said that it seemed to be regarding US sales alone. Many Metroid titles have gotten past 1.5 million worldwide, so that wouldn't be a very significant bar. They talked about expanding Metroid's audience, hence the Wii remote only control scheme, it is clear that was their goal, they just failed.
A game I'm developing with some friends:
www.xnagg.com/zombieasteroids/publish.htm
It is largely a technical exercise but feedback is appreciated.