Infinity Ward told the Official PlayStation Mag in the UK that Activision didn't want Infinity Ward to make a modern day combat game and instead wanted the US based developer to create another World War II title.

"With Call of Duty 2, we were dead set against it being World War 2," Zampella told OPM, "but Activision really wanted it, the compromise sort of being that we'd get some dev kits for consoles in exchange for doing a World War 2 game."

Zampella also mentions how Activision saw their studio as a PC developer, "We always wanted to be on consoles and Activision saw us as more of a PC developer."

"And something I'll add to that, Activision also did not want Modern Warfare. They thought working on a modern game was risky and thought, 'oh my god you can't do that, it's crazy!' They were doing market research to show us we were wrong the whole time," Zampella stated. Project Lead Jason West piped up and said, "They wanted it to be World War II. Again."

Of course Activision must be pretty grateful that they eventually caved into Infinity Ward's ambitions, especially considering that Call of Duty 4 sold around 14 million copies, and the follow up is looking to smash that record.

Im sure if Treyarch had developed CoD4 then it would be good and like the original CoD4 but maybe better, and then when IW makes a WW2 game everybody says they copied Treyarch, its just the fact that IW were given the chance to make a Modern game before Treyarch.
Treyarch is better period.

^ 2 bites to your neck and then tell me you're still in one piece

and yeah, for the excuse of saying "ill try to cover my neck with my hand", I'm telling you right now, its not happening