If you drop a heavy unit like a commander or a vanguard on top of another unit or structure, it should be crushed, or damaged and have a dent in it. 4 teh lulz.
We should be able to mod that by giving the dropship an attack that activates on drop and targets the drop zone. Just have to time it right. That said wouldnt the commander or other unit also take damage in this scenario?
Every participant could lose HP equal to the current HP of the other. So someone would come out on top, I guess.