Here is the faction list for the first release. This will also be custom battle only.
Holy Roman Empire
Empire of Nicaea
What will be included is all the units related to 1200s for the most part. Later era knights, guns and other later armor will not be in this first release. We'll try to have most of the UI stuff done too, or at least enough that it looks Medieval. There will be no Campaign stuff for this first version for a bunch of reasons including lack of man power to get it done atm. If you have any questions or the like please post them in the comments below.