Fan Casting "The Doctor" in Batman: The Dark Knight Returns

After the credits, we cut to a laboratory hidden far away underground in Alaska, where Victor Fries is watching a large group of heavy-layered individuals constructing new pices of his fortress, before one of them walksup to him from behind. Victor asks, "Is the cure ready yet?" and the henchman replies, "Almost, doctor. We just need the blood from a human being as the final component for the cure." Before Victor says, "Good. I just need to draw the Nightwing out, and, at last, Nora will live a normal life again, without her heinous illness that is killing her."