I think an awesome idea for a map would be a navy sort of thing. I know it sounds dumb, and I haven't spent a ton of time thinking about this, so just hear me out. There would be a bunch of huge ships, like cargoships or battleships, with multiple levels, and mabey it would be cool as a seige, and you come off one ship, and go to the next one and try and overtake it. Ya that would be awesome, and you could incorporate your four team idea by having multiple ships. It would suck if it wasn't done right though.
Also, is there any way to make a turret sort of thing that shoots either paintballs or grenades ? Because that would be soooooooo awesome if you made some in the ship idea I had. Also, if there's not, would it be possible to custom desgin one, and if so how long would it take and how much effort ?