It would be quite cool to have missions, kind of like Rescue Robots that was on Citv or Channel 4 a few years back (never actually saw it, just remember reading about it in the Real Robots mags).

So you could set a mission where the machines have to go and retrieve a toxic waste container that's been accidentally dumped in a built-up area and place it in a safe zone (so you'd have to incorporate some sort of lifting arm to pick up/carry the container) but to keep the combat aspect in it, you could have two teams competing against each other to reach the same container. If your machines cross paths with the opposition, you have to fight it out and hinder your opponent in order to be the first team to retrieve the container and succeed with the mission.

Just a random out-loud thought, but it would make for enjoyable viewing