I dont follow you Master Virus.. could you emphasize?
Maybe you should have a combination of all the main genre's of maps; a bound, a RpG, a defense, and a movie. You could sepereate each area into four sections.
For the 1st part, or the bound, maybe you could construct the words "Battle Forums" using tiles, and then the bound takes place in the words. Each letter would be one level.
In the 2nd part, or the RpG, you could have the players select BF heroes, such as TheSummit, Jason., AxL, Akule, Cortalos, KillerMe, TrongaBonga, or whoever, and make it their goal to defeat "Negative Tweak," or the dark form/side of Tweak. Lol, I thought that would be funny..
In the 3rd part, or the defense, you could make it like any normal defense (Cloaked Bunkers, etc) and you have to defend against the Blizzard Forum minions =P.
In the 4th part, or the movie, you could basically show a brief, exciting history of the BF forums.
I think this would be a good way to design the map. The official BF map should embrace all UMS games =P.
I hope I gave you guys some good ideas. If you use this idea, give me credit =P.