The news that the Joker was Superman's brother came as a shock to everyone. No one had ever suspected that the two were related, let alone siblings.

It all started when Superman was investigating a series of crimes that seemed to be connected to the Joker. He had been trying to track down his arch-nemesis for weeks, but every lead seemed to lead to a dead end.

One day, while Superman was flying over the city, he spotted the Joker walking down the street. He flew down to confront him, and that's when the Joker dropped a bombshell.

"Did you know...