In Flashpoint #5 (via ComicBook), Mistah J’s name is revealed to be Jack Oswald White. The iconic Batman villain has taken on several names and identities over the course of his storied run in both the comics and live-action, with Jack Napier being the most common moniker. Of course, the name Jack Napier originated from Tim Burton’s 1989 Batman film and while it was a name intended for the Michael Keaton and Jack Nicholson classic, the comics would later go with it. In 2019’s Joker, WB decided to give the character a new identity in Arthur Fleck and a more tragic backstory.Also Read: Warner Bros. Discovery Has Only Greenlit one DC Film So Far Since MergingIt’ll be interesting to see if DC will go with Jack Oswald White moving forward but I totally dig the name. Meanwhile, the Clown Prince of Crime is set for his next live-action appearance in Joker: Folie à Deux which is currently the only DC film that has been greenlit by Warner Bros. Discovery. As for Matt Reeves’ version of the character, it’s likely that Barry Keoghan will serve as the main villain for The Batman 2.