Either that or the great Emperor was a sell-out.
"Unfortunately, no. I own my galaxy with the Emperor and no other. I believe your assistant possibly used my suit as an inspiration for the design of yours. At least he or she has some semblance of good nightmare fuel. Still, there's no reason for me to kill you, admittedly. There are far more things worthy of death by choking or lightsaber." nodded Vader. "Especially while that "Ku" thing exists."