There are only vague concepts for a few quests based on David Gaider's early recollections of the planet.
I do intend to stick to the basic premise of these quests, however I will make deviations as necessary where it makes sense.
As far as cut modules, there really aren't any. There's some fairly complete geometry from the arena, which was not really in a state to be used. I modeled the current arena after it, but I made it open-air like a colosseum. For the rest of the areas, there are only screenshots of the street. I've done my best to remain faithful to those images in modeling the street. So it's all new content and models. Fortunately, the original textures from Sleheyron still exist within the game and I've used them extensively and added a few along the way.