Mario himself is a system seller... i'm not sure an individual one of his games is however.
When you buy a Nint console, you expect:

A) Mario
B) Zelda
C) Their other franchises

you can pretty much say they are system sellers by anticipation.

Metroid is too complex for most new comers, complexity is not just the concept of what you do in a game but the approach needed to get through it, the 2d games utilized exploration and puzzle solving which are far ahead of other 2d games and the Prime games well ask the people who thought it was going to be a fps, this series has never been a mass market series because of this.

Galaxy sold 8-9m copies and was released at the end of the first years of the Wii, I'd gladly put money on it that a large chunk of these sales are the blue ocean crowd, if it was a launch title like intended it may very well be much higher up in sales. Sunshine and such wasn't even released this gen when the blue ocean strategy began even though it's the cubes second best selling game which kind of contradicts your point, people are saying the users who want Mario will already have the Wii problem is new gamers looking to join the fray will want a recognizable title and whose the most known?

not for the casual , but for the 360/PS3 owner out there i think it may happen cuz other M is way too epic for any self-called games let it pass , special with the wii now at 199,99. is the real deal.

And in japan Nintendo can bumble Other M with a special Wii edition , it also would help wii sales over there.

I was just about to say this. It's official. "Metroid: Other M" will sell Wii consoles.

I think they will both help Wii maintain a higher baseline than last years late spring/early summer lineup did.

Software sells hardware. So yes they will both sell systems. Thing is. How much? Can galaxy 2 appeal to those who didn't like the first game or will it sell to only those who bought the first one.
Will Metroid sell better than prime 3 or will it only appeal to those who bought Prime 3.

I think that it will push some systems. The 2 games will proberly stop the wii from slowing down too much. That's all I see right now

We'll probably see a noticeable bump in hardware sales the week of SMG2's launch, partly because of the heavy advertising and partly because Wii should be back to "normal" supply at retailers by then. Don't think that Other M itself will move much hardware during its launch week, but I expect it to easily have the best 1st week sales of any Metroid game ever... I expect it to do a minimum of 750k during week 1, and SMG2 should easilly top a million, maybe even coming close to 2 mil in WW 1st week sales.

I say no to Mario.
I say yes to Metroid.

I say ioi is right. I mean, he does own a videogame sales tracking site.

Both games will not sell consoles(on a large scale).