According to a rumour from the "Hot Scoop or Shot of Poop" segment of The Weekly Planet podcast, 'Joker: Folie à Deux' will be told from Harley Quinn's perspective : r/DCEUleaks
Catherine Keener Cast In Mystery Role In Joker: Folie à Deux
Lady Gaga's Harley Quinn Will Take Joker: Folie À Deux To New Heights
Joker: Folie à Deux director reveals our first look of Lady Gaga as Harley Quinn - Meristation USA