Had an idea for an objective-based map. Grey numbers are neutral; I think the rest of the image speaks for itself:
So it's sort of Oasis meets Conquer Man, only different. I was thinking an underground theme, with troop decay being toxic fumes, killer neutral being rockslides, and bonuses being buried treasure/resources.
I can tell you that I'm probably gonna be busy to develop this map any time soon. If someone feels like collaborating it's another matter, but on my own it could be a few months before I pursue it.