Please tell me you haven't started yet
Because I've been working on something along these lines for quite a while now, and I've tried to incorporate a lot of little known uses for add-ons in the game too. Like uses for buildable elevators, some in depth bot events, a little of VCE, and I think it's pretty cool so far.
Although lately I've gotten lazy with it, maybe once I get home I can come online and show you it so far? You can change and add to it to your desire.
If this is going to be a large, high quality collab, since mine was a solo project it may be a little low quality for this. But at the least, I have a lot of good ideas and uses in it that can be used if nothing else.