I thought there was no reason at all in 2019 for making another film featuring the character The Joker. It had been done, and reached its apogee in the past.
Cesar Romero camped it up as The Joker in a television series (1966-68) and a film Batman: The Movie (1966). Jack Nicholson nailed the role in Tim Burton's Batman (1989). There was no further reason to personify the character.