Mark your calendars. Call of Duty: Black Ops 2 explodes in stores on November 13 for PC, PlayStation 3 and Xbox 360 gaming systems. Publisher Activision and developer Treyarch have revealed the next installment of the hugely popular first-person shooter with an enthralling new trailer that shows off the first fully futuristic Call of Duty game. Those ready to make the plunge can pre-order Black Ops 2, which costs the usual $59.99. Set in the year 2025, the main story of Black Ops 2 revolves around the notion of a \"21st Century Cold War.\" The trailer reintroduces one of the main characters from the first Black Ops: an aged Sgt. Frank Woods. And as with most sci-fi sagas, machines take over the battlefield. As Woods\' musings about the future carry on, an exciting montage shows off new features such as armed quadrocopters, mechanized walking vehicles, and even usable horses. Yes, you read that correctly -- you can ride horses in the next Call of Duty game. Activision has opened up some discussion forums for Black Ops 2, with mention of a Wii version of the game and support for Zombie mode. We will undoubtedly learn a lot more about the next big Call of Duty release in the weeks leading up to the massive E3 gaming expo, June