1940s Film Noir Superhero Poster Prompt

A 1940s film poster for a movie titled 'The Iron Detective'. The poster features the superhero from the provided image, now named 'The Iron Detective'. He is dressed in a gray trench coat with goggles and a dramatic gray cape, giving him a rugged, determined look. The background shows a noir-inspired cityscape with shadowy figures and dramatic lighting, highlighting his role as a hard-boiled detective. The color palette includes bold grays, blacks, and flashes of red for dramatic effect. The title 'The Iron Detective' is prominently displayed in a dynamic, retro font at the top of the poster.