Daddy
When I read this chapter, and thought about the Joker's punishment in my mind, if I was an ALL-POWERFUL Being, many things came to my mind, but the one that stuck was, to make THE JOKER the lone man. Since, Joker loves playing his jokes on others, leaving him without the audience, will make his existence insignificant. After all, what will he be without an audience to perform for, this idea came to me from the Umbrella Academy, and my thoughts on what Immortality truly means. An existence without anyone else to talk to, an existence where your purpose, or your dream can never be fully filled, an existence where there is no one but the Joker, with his own jokes and no one else to impart them upon. This in my opinion is the worst punishment for the Joker.