Turns out I'm not writing the fill for that prompt I mentioned. Though I'm holding on to that for maybe later.
I decided to do the sequel to another long fill I did called Lost in a Life, where the punishment for breaking the Laws isn't death, but being enslaved by a collar. Harry kills Justin, etc. and winds up eventually being bought by Marcone. The original prompt was for dubcon, but the fill was definitely noncon (in the sense that Harry *couldn't* say no), with mindfuckery, etc. So now I'm writing the sequel to that, where things happen four years after the first one ended and Harry gets part of his control back and John has to deal with that and the fact that stockholm goes both way and then I'm throwing Hendricks in the mix so it's going to wind up as a threesome. *headdesk*
tl:dr - slave au's are awesome and I'm writing more of one