[amannababanana]

Optimistic:
Multiple "flags", 3 alliances. Alliance A has the flags in their base, alliance B and C sort of work together to capture all of them. Alliance A scores based on how long they can defend the flags. Once all the flags have been taken, whichever alliance captured the most flags gets to defend. Possible obstacles that can be pushed. Really hoping for more emphasis on autonomous, but I don't know how it would work for that.

Pessimistic:
Alliances push around towers to prevent the other alliance from scoring in them, Lunacy-style.