I didn't wanna make it too dark because then the overlay on the characters strains the eyes. I added glow to the city to have that more be the focal point.
This is his original stage:
Spoiler, click to toggle visibilty
So basically I just made a night version, and added new elements (new bg city, made it HR, added a helicopter, edited the original floor and added poison in the bg.)
This stage is simply almost perfect... such detail, i'm astonished.