A long time ago I did have an idea for a warthog to utilized anti-personnel artillery shells. The turret would have a mortar configuration, it would launch the shell high in the air, then at a certain altitude it would explode, raining shrapnel down on an area. I did want to make a missile hog, Tiamat beat me to it. Then there was the idea for a warthog to launch a spy drone from the bed in the back.

That last one could only be used as a novelty though, more suited to maps like coldsnap. I am still heavily interested in my shrapnel hog though.