Joker vs Kingpin
Ok, heres how this works. This is a mob war, with both sides having the human, monetary, weapon, etc resources they are well known to often have. They are absolutely allowed to utilize any henchmen they are known to use (e.g. harley, bullseye). It can end with a one-on-one battle but does not have to.
please explain yourself logically as to why who wins or why no one wins.