harley quin and deadpool

Joker vs Deadpool

Imagine a DC and Marvel crossover where Deadpool and the Joker meet. The death count would be maddening. Would the Joker go mad over the fact that deadpool can’t die? Would deadpool try to kill the joker for fun? Or would deadpool try to kill batman because why not? would Deadpool would kill the Joker after learning he’s killed/hurt kids and a robin to boot? Would they talk to the reader? Both of them brake the 4th wall… What do you guys think? What if deadpool met Harley Quin? How would that work?