"Originally, we obviously knew we were going to get Kevin to do Batman for this scene. We didn't know at the time and I'm not sure if he knew because it was a year away from when he passed away. We were making jokes about it at the time saying, 'This is your last Batman animated, blah, blah, blah,' and he was laughing and making jokes about it too."
"In hindsight, it wasn't intended to be his final performance of the character but it turned out to be that way, sadly. The lines he did were only two lines really but he wanted to stick around and do the lines for the other Batman just for fun [Laughs]. He was having a good time with it, but we don't know if he was sick then or it happened later."
"Unfortunately, it wasn't intended to be his last performance but sadly now it is."
"Once we told Hamill...we told him, 'Look, Kevin is doing it' and he always called us if Kevin was doing even just a couple of lines. He said, 'As long as Kevin is doing it, I'm all in,' and that was that. Even though he did state a couple years before that he'd retired from The Joker, he did want to do this one. Again, he didn't know anything as far as what Kevin's outcome was going to be. He was just doing it because it was a good end statement to Batman: The Animated Series for both of them."
