Been thinking the same thing myself. I've tried to keep an eye out online for any sightings of a Stinger development mule but I haven't come across anything just yet. There were a few articles discussing the development of the D-AWD system for the Stinger which uses a limited slip differential in the rear. I wonder if there might be plans to drop a hotter performance focused variant of the Stinger with the new AWD system, Lambda 3 motor, and perhaps a stiffer suspension setup. Would be nice to see that model come along in 2020 alongside a mid-cycle refresh which includes the larger 12'' UVO screen coming to the new K900.