Responding to a fan on Twitter who asked if "The Killing Joke" will be his last time voicing the Joker, Hamill simply said, "no."
- Mark Hamill (@HamillHimself) July 13, 2016
It's understandable that fans would be worried that the R-rated animated film is Hamill's last time voicing the Joker -- after all, he's been voicing the character for nearly 25 years. Hamill started voicing the Joker for "Batman: The Animated Series," and continued to portray the role on "Superman: The Animated Series" and "Justice League," in addition to various games, including Rocksteady's "Arkham" series.
Kevin Conroy, who's reprising his role as Batman yet again for "The Killing Joke," has also indicated that he isn't done with his iconic role. As for Conroy and Hamill's next project together, that's yet to be announced...