Wraith had suggested in the forums a Skirmish map made like a battlefield.
Create a map with 2 keeps enclosed by land. Have most of the map just open terrain but keep it interesting. Next, place various but equal units on the map on either ends. Keep it under 800 total . To win, eliminate all other units."
After reading this I got to thinking it was an awesome idea, so I ran with it. Insted of a 2 player I though it would be more hectic with a four player.