For one thing, it was a launch title on Wii, which means gamers hungry for an FPS had ony two options for quite some time: Red Steel or CoD3. So, naturally, it sold solidly.

Secondly, I didn't realize the Wii had a big base of FPS fans to begin with (they aren't exactly catered to very heavily, are they?), so it's a safe to bet that quite a few are getting their fix (like me!) on PC/360/PS3.

Finally, the other posters have covered any and all other possibilities and it's pretty painfully obvious it's going to out-sell 3 in the not-too-distant future.

So to directly answer your question: nothing.

When was the Wii ever considered the FPS console...? Did I miss something? I thought 360 had a problem trying to remove that label. Why would there be any question why people skipped both PS3 and Wii to get this game.

Goodriddance, fps games need to go away, permanently.

Hardly.  All genres of games have at least a few games in them that are fun.  FPS are no exception.  But like all genres of games, FPS also have an endless ocean of copycat and worthless product to sift through to find those few good ones.  And FPS could use a good genre-breaking game to kill off all those copycat games and revitalize the creative juices.  And no, the stuff we've seen on the PS3/360 in the last few years have not been it.  We need a GAMEPLAY based revolutionary change, not just amazing graphics and a new twist on the old.

Wii owners aren't enthusiastic to the point that most of them buy the game on day 1.

Many games will have to crawl to a million, FPS included.

I never used to buy FPS. I hate the dual analog controls. now I have Medal of honor heroes & Call of duty WAW and I can't wait till the conduit comes out. I now consider myself a FPS fan. So I think It's gaining fans.

Its weird that the Wii doesn't have like bun loads of FPS games. The pointer is perfect for it. We do have the conduit and the Metroid remakes coming this year though.

There should have been a ton of Zapper games by now as well too.  Especially since Resident Evil: Umbrella Chronicles was a million seller and the other Zapper games aren't doing half bad for ports.

But it doesn't really mean much.  The Wii just needs more Third Party support on the whole, and so that's why it lacks FPS, Zapper and etc support.

As some people correctly pointed out, the FPS base is increasing, but that's completely expected. Games tend to sell more in year 3 than in year 1 you know.

But the Wii isn't really selling shooters.

What do you have?

Link's Crossbow Training - 2.93M, but should sell 3.5-4M. Still, it's Link - the sales are expected.

RE4 - 1.76M. 

RE:UC - 1.33M.

Red Steel - 1.08M

House of Dead 2&3 - 0.94M

CoD 3 - 0.63M

Cod:WaW - 0.6M

Ghost Squad - 0.58M

MoH - 0.27M

.... And then there's none above 200K.

Needless to say, this is nothing.

The Ps3 has 27 games that sold more than 200K.  That's 3 times of the Wii.

The Ps3 has 17 games that sold over 500K. That's more than 2 times of the Wii.

 And the 360 has 23 games that beat 1000K.

Quite simply, the Wii isn't a shooter platform. Selling 1M + is impressive for a Wii shooter title, and CoD: WaW should make that.

The Wii may be a good platform for shooters (quality wise), but they simply don't sell well on the platform.