I don't think it will be the conduit.
It may be a generic FPS by PS360 owners, but The Wii doesn't have any generic FPSs. Critically, it may not do well, but commercially, Wii owners are starved for FPSs. And one that looks good (For the Wii), and has online will get an automatic pass for Wii only owners. For people like me with a Wii and a HD console, maybe not, but I know a few Wii only owners who are hyped for a shooter to no end.
I'll say Too human though.
The game comes out in 1 month, and I don't see any ads for it, no commercial or nothing. Hype is low, and the demo impressions are bad.
Killzone 2 will be the best of that bunch.
Every preview is positive, nothing bad is said about the A.I. (which plagued the first game), it's been called generic by FPS standards, but we've only ever seen one stage of the game, so who knows if that's true or not. But Guerilla has said that there are going to be lots of variation in stages.