screenrant.com -BY MICHAEL JUNG - Harley Quinn and Poison Ivy first met in Batman: The Animated Series – but their romance took much longer to bloom in the DC Comics!
www.denofgeek.com -By Mike Cecchini - With the addition of Ben Affleck as Batman, and the inclusion of Michael Keaton as Batman, The Flash movie will make the DCEU into a true cinematic multiverse.