I suspect packaging the four wheel drive system is tight in the V8 models, but if demand is there they will do it.
Also need to remember that the chassis is changing soon for a smaller lighter model.
To be honest, most say the scatpack is almost as fast and much more useable. The hellcat just annihilates tyres whenever you go near the throttle which makes cornering tricky.
But 707hp from the factory, just has to be done. A pulley change, tune and longtubes should see almost 1000hp.