Are you serious? Advertising is especially important to games that doesn't have a defined audience. You know whats the most popular game out this gen? COD:MW2. Do you know how much advertising it got?
Call of Duty cost $40 million to $50 million to produce, people close to the project said, about as much as a mid-size film. Including marketing expenses and the cost of producing and distributing discs, the launch budget was $200 million, on par with a summer popcorn movie -- and extremely high for a video game.
It got $200 F'ING MILLION!!! You shouldn't need to advertise that much when its already freaking established multi-years in a row.
I bet all the 3rd party games on the wii had a combined developing budget less than that.
A few wii games are more popular than COD