My idea was basically to have a defense/offense kind of game, with Knights on the offense and Gremlins on the defense, but the Gremlins would be controlled by players. Like Lockdown, players would be placed in ranks depending on their gear. The players who get to control Gremlins would control Gremlins equal to the Knights over-all gear, i.e. tier 2 Knights, tier 2 Gremlins.

The Gremlins would be trying to defend a fortress of sorts, which the Knights would have to storm and capture. The Gremlin players could build constructs which could aid them, i.e. mechanical knights.

I'm leaving specifics up to debate, I'd love to get some feedback from the community.