I agree that it would be stupd for developers to wait to see how successful these are. If they suceed then the developer will need to spend a good two years making the Wii game awesome, by 2011 we may even see a new console.
If anything Call of Duty World at War, should of started ringing bells already. For a half tried attempt the game hasn't turned out too bad and has sold some decent numbers.
None the less I will get both games myself as they seem somewhat interesting. After playing Killzone 2 I know the conduit won't be as WOW for me mainly cause of all the on screen action you see in Killzone 2, but if they have nailed the controls I will love it as much.
I really want to see some decent fps wii controls.