Batman: Mask of the Phantasm (1993) on Netflix

Someone is killing off some of Gotham's mob leaders in an eerie costume, vanishing and reappearing like a ghost and eyewitnesses insist that it is Batman. The dark knight is now in serious trouble with the police, accused of being dangerous and unpredictable. Hunted wherever he goes, Batman must solve the mystery of the Phantasm to stop the killing and regain his reputation. Meanwhile old wounds are opened as Andrea Beaumont (whom Bruce Wayne had had a serious love affair with in the past) returns to the city. Memories of the past are now preying on Bruce's mind, memories of a time before Batman where Bruce was drawn between happiness and the promise he made to his parents. The mystery of the Phantasm is really putting Batman's skills to the test as the police slowly draw in with no mercy. The answer to it all lies somewhere in the past of both Bruce Wayne and another deadly foe, The Joker.