If you're looking for just 1 then this update has you covered (there's some small generic chain)
On a real note, I think the thread could use an update about what HHS+ is... HHS+ is the game engine (main focus of the engine team), what you're referring to is the Smallville Scenario (the story events and mechanics). Currently that side only has 1 person making certain mechanics more moddable - the rest of the team got lost along with the site (MIA).
Though the whole team is simply random people from the game's community, so anyone could expand/provide content for events and story chains at any point (even by just providing text that those with more knowledge can convert into events). We've got a post detailing how to do that (efficiently, but other attempts are welcome too) along with a WIP summary of unfinished areas on the Discord.
I don't mean this in any insulting way (or whatever), because yes, there's little progress on scenario side, but that progress comes from the community. All but a handful of core 'devs' were simply people that put a bit more effort into it than average because they felt like it.