I mentioned "DemonInc." in passing the other day. It's been in my head for a decade plus, but I never did much with the idea beyond Heaven and Hell being run like corporate offices. (Hell, the characters predate me, myself, working in a office.)
The basic premise was an angel transfers from AngelInc. to the DemonInc. branch, wacky hijinx ensue as she meets her new coworkers.
Frankly it was mostly an excuse to draw demons in fancy suits, and I've come to realize I can just do that whenever I want without having to attach it to a story.