Forget about base building, resource-node-jumping, and unit micromanagement. When it comes to these elements, Mark of Chaos takes direct cues from its tabletop heritage. The size and make-up of your armies will be regulated by a points system, and each scenario (or multiplayer match) will have its own limitations. You'll have some decisions to make. Will you take, say, two smaller regiments of relatively powerful units, or four rank-and-file battalions, and hope to horde your enemy? Some armies will be weighted in one direction or another; High Elves and Chaos, for instance, tend to field smaller forces of individually powerful units, while Skaven and Empire armies tend to be the opposite. Luckily, the game will come equipped with ready-made army templates that adhere to common point totals, so if you're not the type to sweat the small details, then you should be at least reasonably competitive if you choose one of these.
Four different armies including the Empire, Skaven, Chaos, and High Elves will be fully customizable (like painting the miniatures and the like) and available for use immediately. Considering the number of different armies available in the Warhammer universe, it would have been close to impossible to balance all of them in any realistic manner. So instead of choosing to force all 17 armies in or stick with a mere 4 armies total, the devs have decided to include units which they're calling Dogs of War. These special units will be available to all of the armies and will include pieces from many of the other armies across the Warhammer fiction.