Death is a minor annoyance in any superhero universe. But we've reached a point where screenwriters don't even try to pretend these characters are mortal, and the characters themselves seem to know it.
Serial killers in movies are all constrained by the same limitation: The imagination of a screenwriter, who is presumably not a murderous psychopath. No matter how disgusting or outright evil the fictional killer, there's somebody out there topping them in real life.
Centuries from now, our grandchildren's grandchildren will be watching beautiful people erotically waterboard one another on the beach, and they'll have no clue where it came from.
