How about making a game witch combine lemmings and worms style gameplay.
One team has realtime movement (lemmings) and the only way for them to kill the other team is to blow themselves up (with a 5 sek countdown). Could get surprises if they get a crate. (suicide parachute lemmings, suicide airplane. and more)
The other team is like hedgewars, with a delay to make the game playable. So both teams have a chance to win.
The "lemmings" team could be made up by 50 members (or more depending on difficulty level) vs few well armed "worms".
It is just an idea.