Fog of War setting with additional recon option. This option would allow you to do a fly over of selected '?' marks and see what is there. Maybe you select a territory before your turn begins and you have a 40% chance of seeing what is there, and a 20% chance of seeing what is in its adjacent territories. After the turn you use it the territories go back to '?' marks. Could have 1 per turn, or a limited # for the entire match (and you select when to use them).
Details could be different of course, but general idea is the same.
Benefits:
- Unique game play
- Mimics actual warfare