Payload racing, that is along the lines of the new gamemode.
I would love to see double payload. Where Blue team has to push two carts, but Red team has some stymie like not being able to go certain places.
My friend also suggested two bombs going in opposite directions, where you have to play offense on yours and defense on the others. That might be kind of fun, simply because if there would be five stages. (I.E. Blue teams wins>Stage 2 Blue win> Stage 1 Red win> Stage 2 Red win> Stage 3 Red win> Stage 4 Red win> Stage 5 Red win> Red victory.) It'd be kind of like a tug-of-war match.