Whoah. So the expansions I'm currently considering are one that adds to the Artifacts list a bit, Seven Strangers 3, something that goes into a bit more detail on some of the cults, and then a couple more scenarios.
Mythic Twilight sounds really cool. The idea for legacy play is excellent, and I really like it as a counterweight to how Miseries work. I don't currently have any plans to write anything like it.