(Repeating some of what others have said):

1. With army movement on the campaign map, do different units have different 'movement points'? i.e. can an army with just cavalry in it move further in one turn than an army with just light infantry, which can in turn move further than an army with heavy infantry?

2. How can you influence whether you fight during the day or at night?

3. Will faction re-emergences still be in like they were in MTW (tied to loyalty of province etc) and will they re-emerge with good quality troops?

4. How has multiplayer been changed from MTW/VI? (e.g. new options/features/game types)

5. How will we be able to mod the campaign map (since obviously it will be nothing like modding it in MTW/STW)? Will there be a 'campaign map editor'?