You can endlessly repeat that complements (as well as new-fangled "episodes") - an easy way to draw out people who bought the original game, a little more crisp bills. However, the manufacturers themselves will tell you immediately that the add-on - a great way to "tune" the original user's needs. Until the game is released, can not be sure what will remain dissatisfied customers, but after the release you can listen to complaints and suggestions, and roll out just such an addition, what the public wants. So in the Empire Earth II: The Art of Supremacy came the Russian nation, and in the Age of Empires III: WarChiefs Indians finally became an independent nation. More precisely, even three: the Iroquois, Sioux and Aztecs.
