The Flash Michael Keaton Batman 1989 Cosplay Costume Mask New Edition The Flash Movie Michael Keaton Batman Halloween Cosplay Costume Batman The Flash Michael Keaton Deluxe Costume Child 2 Sizes The Flash Michael Keaton Batman 1989 Cosplay Costume Mask Style B Takerlama The Flash Movie Michael Keaton Batman Halloween Cosplay Costume. This officially licensed Batman Deluxe costume from DC Comics Flash The Movie (starring Michael Keaton) includes a deluxe padded costume jumpsuit with attached foam backed boot tops and gauntlets. A plastic character mask is included. Available in 2 boy's sizes Medium or Large. Costumes typically run a little smaller than regular clothing sizes. Please purchase accordingly. Other Batman and superhero costumes and accessories (hats, wigs, character masks, glasses, theatrical makeup, gloves, weapon props, jewelry, leg wear) are sold separately on our page subject to availability.