Reading this gave me a really odd idea. One of the ‘mysteries’ of the Joker is that we never -fully- find out his identity, right? He was the Red Hood originally, and before that, possibly a failed commedian.
But what if that’s not the case? What if he’s… Well… Serially recurring?
I know there’s no evidence to support this, but it would be interresting to find out, some time in the future, that Batman doesn’t kill the Joker because he knows the pointlessness of it. “He’d come back. As someone else. Every bit of work I’ve done profiling him would go out the window, and, frankly, he could come back as someone in power, or someone with superhuman abilities. Right now he’s dangerous, but he’s not president, or superman. I’m willing to live with ‘dangerous’ for now.”