If ever given the chance to do something in the DCU,THIS is what I would love to do.
DARK KNIGHT DETECIVE; a crime series set in Gotham city. Not a superhero book. It would be a mix of the Batman Animated Series, Year One, Gotham Central, and The Wire. This would be a more street-level book with the emphasis on the Batman solving actual crimes, instead of fighting super-villains all the time.
As seen above, I would love to make the covers look more like those old pulp crime novels.
Not that it will ever happen, but I live in hope....