I see all fanmade sequels as somekind of alternate timeline-like stories. Mostly because official, canon FS3 storyline exist and always existed. In this regard, all fanmade continuations are effectively equal.
I don't fully believe Scott Jason saying "Beyond that, we didn’t really have anything concrete.
". He revealed us as much, as the NDA allowed him to say. That's how corporation policy works. They still own the IP, so Interplay as every corporation jealously protects their properity. Even if they don't want to do anything with FS IP, it still works as "possible source of income". I remember fanmade EVE Online RTS project killed by official devs for the same reason.
Majority of devs have way more ideas, and sometimes even complete plans for all possible continuations including spin-offs, expansion packs and finally sequels. Nobody produce unfinished stories just because if one instantion generate satisfying income, production of the sequel is usually immediately launched. It happened for FS1. I believe that at least rough draft of the FS3 story exist.
If anybody acquire the IP, he would gain access to all docs
members produced during pre-production stage. Maybe even complete with concept art for possible ships and locations from cancelled FS3. Former
staff members are aware that we exist, and we would kill for access to official files. Looks like the interview suggest, that FS3 entered it's pre-production stage. It's exactly when concept arts and story drafts are being born. Staff members probably heavily briefed those ideas, when high call from Interplay appeared and killed whole project.