Treyarch head Mark Lamia has said that Call of Duty: Black Ops didn't "draw anything from" Modern Warfare 2, mainly due to the developmental time frames, and because the studio didn't want to.
Speaking with CVG, Lamia said that development on Black Ops started a year before MW2 was released and the games are "two totally different developments, two totally different creatives", and that the game is all about new experiences.
"We started Black Ops a year before Modern Warfare 2 came out, so we didn't ask ourselves that question because they were making their game and we make our game," he said. "We're two totally different developments, two totally different creatives.
"What we did think was we're going to make a Call of Duty game and people expect another great experience. We obviously had a lot of confidence that Infinity Ward would make a great game but that game hadn't come out yet so we couldn't draw anything from it and weren't going to.
"It was all about what we wanted to create and what that was is something new and fresh - give players some variety, give people a reason to come back to Call of Duty and get some new experiences."
Lamia also confirmed recently that the studio is now 100 percent Call of Duty.