MC Helo Units

[CheerfullyInsane]

Alternatively, you could treat them like some sort of long-range Deception-units, capable of delivering helo-strikes or air-landed troops within some set radius of their HQ.
And just like Patrolling negates the effect of Deception units, AA units could prohibit the landing of airborne troops.

But again, we're talking a major rewrite of the source-code here, so I'm not holding my breath. :)