So, I've been thinking about this league system that Mythic used to utilize and trying it out in DP, but a little different.
Basically, there is a map and each team has certain 'areas' or territories on the map. Each area will correspond to a particular map in DP. Your team may challenge any team who has an adjacent area. You play the map, only one time, until a victor is made. The victor takes over that area. At the end of the league, the team with the most territories wins.
You'd be required to challenge at least one team per week and you can not refuse a challenge.
Required challenges must be completed during specific time frames unless agreed upon otherwise by the teams participating.
This is just the gist of the idea. If anyone's interested, I may put this on in addition to the holiday tourney. The league will span a month or two, most likely.
Here's a visual sample of what it would be like. Pardon my nub skills with paths in PS.
You challenge someone, maybe map list for the territory is randomly generated each week.
The final map will have better defined edges.