Why did they kill off Joker in Batman 89?

1989 Batman Joker joker 89 The Joker of Batman and the DC Universe enproduct11649Nendoroid+The+Joker+1989+ joker123ฝาก10รับ100 Batman and his nemesis The Joker are engaged in the ultimate confrontation in this Movie Moment celebrating the 1989 film, Batman

joker8899z  June 20, 2019 1512 x 1512 px Batman and the Joker face off in Tim Burton's “Batman” « Previous attachment