Batwoman has introduced its own version of The Joker, though it's not exactly a comic-accurate take on the Clown Prince of Crime. A newly created character, Marquis is the half-brother of Gotham City's current Craped Crusader, Ryan Wilder. A chance encounter with The Joker as a child left him with brain damage, leading to the emergence of a psychotic Joker-like personality prior to the midseason finale.
In episode 12 of the show's third season, "We're All Mad Here," that moment was revisited in a flashback. As is so often the case with big-name characters in these DC TV shows on The CW (and even HBO Max's Titans, for that matter), we only saw The Joker from behind, though the Arrowverse's Clown Prince of Crime did appear somewhat comic accurate.
Now, Kendrick Jackson, the young actor who played Marquis, has shared a behind-the-scenes shot of the uncredited actor who brought The Joker to life in the Arrowverse.
While we doubt this was ever going to make it into Batwoman, it's certainly not a bad design, and is faithful enough to not cause the same sort of backlash as Jared Leto's take in Suicide Squad. Of course, even this new "Joker" played by Nick Creegan hasn't exactly been embraced by fans, and we can only assume Warner Bros. has real plans for the villain elsewhere in the DCEU.
Take a look at this photo from the set of Batwoman in the Instagram post below: