The Joker has always been one of DC's most mysterious characters, a man who resists labels and definitions in a constant bid to reinvent himself into whatever form can bring the most damage to Gotham City. That constant sense of reinvention has resulted in more than one person claiming to be the Clown Prince of Crime, with little clue towards confirming which is the real one. But DC's latest crossover event might have quietly tipped a hand towards finally solving this mystery.
Source：https://www.cbr.com/knight-terrors-joker-identity-mystery-dc/
