Matt Reeves has been slowly unveiling the cast for The Batman: Part II on social media ahead of the film’s long-awaited production start. After revealing a number of expected returning cast members, the filmmaker has now officially confirmed that Scarlett Johansson will be joining the DC Universe. Johansson has been attached to the project since late last year, but Reeves confirmed it by posting a gif of the actress in  Under the Skin . That might be a bit of a character hint, as the clip sees the former Marvel star looking not unlike Gilda Dent, a character she’s been rumored to be portraying in The Batman sequel. Gilda is the wife of Harvey Dent, aka Two-Face, who is being played by Johansson’s fellow Avenger, Sebastian Stan. In the comics ( spoiler ), Gilda eventually becomes the serial killer Holiday in one of the most celebrated Batman stories, The Long Halloween. Beginning on Wednesday, May 13th, Reeves has been posting gifs confirming his cast for  The Batman: Part II .…