Disclaimer haven't been able to check this thread for a while, and haven't made it through all the posts but had a question. Is the internet lawyer consensus that a chapter master can never happen? follow up, would there be a way to get around copyright laws if it was described as a parody? IE text to speech device, make it a fan made game, no monetization and just change the setting slightly to a what if scenario? FYI I only know a little on US business law/employment law nothing on the EU or their recent copyright rulings.
I don't think the internet lawyers reached a consensus, or it was nuked by the Toad. But I'll throw in my understanding. Chapter Master has no budget and no revenue, so. I don't think anyone is lining up to meet GW in court over this. Making games is already a lot of time and effort, add a court case on top and its even harder.
So the question isn't "would GW win?" but its "would GW sue?" And judging by their past actions the answer is yes. So unfortunately being a parody is not going to be a good defense here.
Now, if you stripped away all the 40k terms + names, and changed the outlines of all the graphics so that none of it resembled GW art assets, then yeah the code of Chapter Master could be used for something. You'd have to ask the internet lawyers if that would be enough to get a lawsuit thrown out of court, but I'd damn well hope it is. Unfortunately it couldn't be called Chapter Master and I'm not sure the appeal of the game would be that great without the 40k connection. Also since CM has already been presented openly as a 40k fan work it would require a lot of modification to be "safe"; if the game had been presented from square one as an original IP I imagine it could cut very close to copying 40k and GW wouldn't care, lord knows plenty of other games are similar.
So basically: does anyone feel like putting a lot of work into a space game that's partly done but can't be set in the 40k universe? That's the answer to your question. (also not making money isn't a defense; most companies simply ignore fan works because it drives business their way. GW is trying to maintain their monopoly on their own figures which is why they're assholes about this. Parody is something else, you're allowed to make money off of a parody)