Hello Knobbyboy88, welcome to the .Org and to EB .

To answer your questions: there will be no emerging factions in EB2. All factions will be playable from the start. I am not sure about the hording factions, but if M2:TW hording is like that of BI then I doubt it will be in. Migrations generally resulted from overpopulation or displacement, not conquest. For example: there were several massive Celtic migrations round EB's time-frame, but when the Romans conquered Gaul this did not happen. However, the TW engine does not make the distinction between conquest and displacement: if you take their last town, they will horde.

I don't think we can add logistical units to the game. I expect logistics will be simulated in the same way as in EB1: through character traits. Nor do I think we can create wagon camps/ manned camps as you propose. There are limits to how far you can mod the game.