The Batman Will Regret Not Using Joaquin Phoenix's Joker 

screenrant.com -BY NATHANIAL EKER-MALE - The Batman had the ideal opportunity to crossover with Joker, and see Robert Pattinson's Bruce Wayne meet Joaquin Pheonix's Joker, but it wastes it.
Keywords: the batman, regret, joaquin phoenix, joker, splatman, splatbat