LivePlayStation: After the hugely successful Call of Duty 4: Modern Warfare, Treyarch had to come out with a sequel that lived up to expectation. So what did they do? Create a World War II First-Person Shooter, World at War. Next up is Call of Duty: Modern Warfare 2 which is set to break all kinds of records. Once again, Treyarch are going to have to create another game to compete with MW2. How do they do that? Perhaps, a Future Warfare game.