In a recent interview Mark Rubin explained Infinity Ward's choice to leave the Modern Warfare series and universe. According to Rubin the choice was "Not a hard decision, but a long decision", he further explained:
"So when we finished Modern Warfare 3, we had this big brainstorming session that lasted for weeks. Everybody gets to come up with ideas of what we want to do, not just what game we want to do, but moments in games.
We all really knew we wanted to continue making Call of Duty. We could have done something else, but we wanted to make Call of Duty and we wanted to create a new universe, or a new story at least. We wanted new characters and new experiences.
The easy thing would have been – as we had finished the arc of Modern Warfare 1, 2 and 3 – to start a new arc within that same universe. That was the first step. But due to a lot of the changes we wanted to make with this new world, it really dictated out that we needed to make something that wasn’t Modern Warfare."
Due to all these new characters that will be appearing, and choosing to create a new world for the game, it questions if there will be a Price in this game, as has been in every Infinity Ward game to date.