FIFA fans can't get enough FIFA, just as COD fans won't be able to get enough COD.
Agreed, americans love their call of duty, and you can release two call of dutys a year and it would still sell a shitload. I'm surprised Activision hasn't thought about it. Europe also loves COD but not as much as americans. Just keep releasing Fifa games every year in Europe, COD for America and Monster Hunters in Japan. Sony would be all set.