While what we know about The Batman: Part II doesn’t include if Barry Keoghan will be present yet, the rumor states that Joker will be The Batman: Part III’s main villain.
Whether or not that happens, I like the idea of saving Joker as The Batman: Part III’s main villain.
The Batman: Part II is due out in theaters October 2, 2026.
Considering how critically successful The Penguin has been, along with The Joker being Batman’s most well-known adversary, I would be shocked if a TV series involving Barry Keoghan’s Joker didn’t move forward.