noobnomore:i dont think to hard but it would be real sweet no doubt ...like to plant a nuke or something.
CnC 3 had some pretty hard single unit missions, even on easy such as some Scrin ones.
Hopefully if they do have this feature the levels won't be too hard and too un-balanced.
Actually some of the campaign levels were very tedious and combined with the bad acting it could be boring.
But hopefully Ensemble implement a couple levels like this and avoid the mistakes that CnC 3 had.

Best of Wishes Sparhawk