Harley Quinn was first introduced in Batman: The Animated series, before being adapted for the comics, video games, and eventually movies. She’s a fan favorite villain, so fans are eager to see how her story will continue to move forward with The Suicide Squad. When asked about her arc in his DC debut, James Gunn teased the comic book influence on her characterization, saying:
Article source: https://www.cinemablend.com/news/2493854/james-gunns-approach-to-harley-quinn-in-the-suicide-squad-will-make-comic-fans-very-happy