Every Call of Duty game is reskinned. You are a complete moron if you think they start from scratch to make the same exact game that came out the year before. Only with "new" maps and scenery. And honestly maps get reskinned to. This was proven in Ghosts when they reskinned BO2 maps and the MW2 campaign. Advanced Warfare was original because a new company designed it so they had to make am impression. (which did not work) other than that its just the same base game with different graphics and some added abilities