Because White Knight takes place in an alternate universe where Batman has become the ultimate evil plaguing Gotham and the Joker is the one hero fit to stop him, this new ish identity for the Joker can be considered another entry in the long list of aliases hes used to perpetually keep people on their toes. But given DC and Warner Brothers blessing and the prominent place that Jack Nicholsons performance as the Joker has in the Batman canon, this name definitely ranks fairly high on the list. Thank goodness it didnt turn out to be something terrible like. Jerome Valeska. Can you imagine Thats be insane.