As it has been asked and discussed before quite very much in this forum and many other places, I think i speak for the community when I ask Arkane to release a series of mod tools that would allow the community to create and add new content to Dishonored.
The DLC content that's been released surely scratches the itch for more hours of fun, but imagine the possibilities for user-made content. It would surely bring new people to the game as well.
I would also ask for the community to bump and keep this topic alive.