Having already conquered the market when it comes to playing action heroes with a penchant for khaki, Dwayne Johnson has now set his sights on the superhero genre as he continues to cement his position as the world's biggest movie star. The 48 year-old is gearing up to shoot the DCEU's Black Adam after finally steering the project out of a decade stuck in development hell, and he's promised that the franchise's hierarchy of power is about to change.