Bill Birch and Geoff Johns to Write Shazam! Actor-turned-writer Bill Birch and Geoff Johns have been hired to write Shazam!, the adaptation of the DC Comics series featuring Captain Marvel. Shazam! centers on teenaged Billy Batson, who transforms into the superhero when he says the word “Shazam!” The studio is now looking to go back to the original DC Comics source material for inspiration. Get Smart helmer Peter Segal remains on board to direct and he’ll also produce with his Callahan Filmworks partner Michael Ewing. Johns will also consult on the project. Previous drafts have been written by John August, William Goldman, Bryan Goluboff and the team of Joel Cohen and Alec Sokolow.