I know how to create these kind of characters as I've seen it happen when I revealed Kealan Patrick Burke wrote a story called The Clause as he was trying to ignore a history lingering as I asked him, "why don't you ask Bram The Talking Wonder Dog about The Cabbie Homicide!" The real-life arch rivalry was born out of this as I will say the Demolition Man had a killer rivalry because the hero had traits of a villain; as you wonder what antiheroes and villains bang heads.
I sent Burke in a rage when I said that statement as he knew what I wrote and had a hard time replicating the results of this story or The Pattern of Diagnosis. When you realize he created an arch-rivalry he didn't like what I did because I pointed out he encouraged academic dishonesty; as A Society Unpublished I created a hero but not quite a superhero but someone who had traits of Batman and Holmes. Batman was created from dark fiction archetypes.