Spike: But on top of all that... it's the finale, so I lost whatever chance I had to be a part of this. At least, that's how it feels, irrationally.
TSDM: Well, I've been taking LOTS of notes, so you'll be able to relive a good chunk of all the campaigns you missed while you were focusing on your mental health.
Spike: Still am, but that's a good point. And I'd be lying if I said I wasn't deeply curious about all your exploits.
TSDM: Speaking of note-taking, though... We're putting a button on the "main" timeline tonight, but that doesn't mean it's all over forever. The six of us will be moving on to other projects – it's been over two years, after all... But we're gonna make sure that people can still keep playing ponies if they want to!
Spike: Really? How do you figure that'll happen?
TSDM: We're gonna publish a setting book! It'll take some time, but we're gonna turn out combined notes into lore! And, you know... I think it'd only be fitting if your name was on it, too...!
Spike: Listed co-author of a lore book...? That's... so very kind of you, and way more than I deserve.
TSDM: If anything, I wish I could do more.
This is fiction, so we can use our imagination and pretend that this is a great and perfectly feasible idea that won't end in frustration, petty infighting, and endless procrastination.
If they're gonna sell his IP as a book, he'd better get a cut. (She/They?, SpikeGM pronouns always throw me. I keep wanting to pronoun Spike the character and not SpikeGM who's female.)
Legally, I'm pretty sure they could successfully argue that SpikeGM gave them all that IP as a gift to do anything they want with (and SpikeGM would be unlikely to sue anyway), but not everything that'll hold up in court is a thing you should actually do.
If Spike doesn't have a copy that predates their version, he would have trouble proving prior art in a court. Also, while they don't have anything on paper, Spike and Twilight have a witnessed verbal contract with intent to remain "hands off" on the setting. How well that would hold up in court is a shrug (INAL).
That said, in a game about how Friendship is the most important power in the universe, and one of the main writers being the player who embodied that ideal, it would seem truly out of character for Twilight to not at least credit her friend with their fair share of the work. Besides, if it weren't for Spike, none of this would have happened.
Well, if the authors of F.A.T.A.L. could actually publish their eldritch abomination of a rulebook, in real life, then I don't need to use my imagination to believe a more or less cohesive group of six people (some of them with a very strong bend towards the kind of dedication and inclinations required for the job, which would probably be the main contributors) could possibly publish a setting book.
All this has me wondering what my old group is up to... the ones still alive anyway. Despite how easy it can be to keep in touch with people, it often seems incredibly difficult to keep in touch with people. Such is the strange nature of the internet. And people.