Dig into the official YouTube page for Call of Duty and you'll discover a five part video series where some experts in warfare paint a very scary vision of what the future can bring. The series features P.W. Singer, a future war expert and author of Wired for War, retired USMC Lieutenant Colonel Oliver North, and a few soldiers as they talk about how far technology has come, and where they see the technology heading.
The above is a synopsis of the five part series, which you can see in full below. The themes this documentary of sorts shows is the scenario fueling Call of Duty: Black Ops II.