To begin with that was my plan, but as I know jack-shit about maps suitable for team play, I scrapped the idea. However, I can't imagine many hordes straying from the "default" maps in rotation on the servers, even though one of my hopes with the tournament were to see more "exotic" maps in play.
If too much squabble arise, I suppose the tournament could be tied up more by setting up map limitations... but before doing so, I'd like to put faith in the decisions of the hordes about choosing maps with high playability and suitability for team play. Sure, it reeks of naiveness...