I haven't seen this yet, but maybe I've missed it. What does everyone think of having a central continent of say 3 countries worth 10-15 armies with a lot of entrance points? The point would be that the continent would be so powerful that everyone would have to base their strategy around that. It would, of course, have to be designed so that it's easy to get into so it's difficult to hold. However it wouldn't be impossible due to the low number of countries.
If I may: The idea is to have a somewhat normal map, except that in the middle of it there is a bonus region made up of 3 territs. The three territs would have many many neighbors (through tunnels, portals, whatever...), and would also give a very large bonus. Therefore, if someone were to hold it for even one turn, that player would get a huge advantage. Throughout the game, every player would have to be aware and develop their strategy accordingly.
I like this idea a lot. You could also make it an objective (to hold the three territs), very easy to capture, very hard to hold. You could even make it so that EVERY territ on the map can one way attack these three regions. Of course the map itself would have to develop its own theme, but I think this gameplay has potential.