I am currently fully entrenched in Microlite20, but what factoids I have gleaned from developing Savage Worlds - Plot Point Settings are interesting. For example; Plot Points, Set Pieces, and Adventure Paths and Delving into Design: Echo of Dead Leaves (Part II) (interesting reads if Plot Point Settings appeal to you). I am planning to attempt a similar tact while pushing ahead on a Microlite20 house rule set for Humanity's Reign & Ruin.
As I had mentioned, I envision Humanity's Reign & Ruin as being two settings, a before and after kind of thing. Humanity's Reign, as a middling magic, human-centric, middle-ages - with monsters, affair. The subsequent setting; Humanity's Ruin, a demi-human-centric, pronounced magic, humans are rare, dark and gritty - with monsters, affair. They tie together with my, for now only in notes and mind, game history.
Currently my approach to presenting these two, tied together, settings is going to be a short paragraph about each and allow the Rules, Tables (thanks to Zak's How I Want To Hear About Your Setting), and Plot Point Setting adventures to speak for themselves. I have a mental image of what, and how, the world and things in it coalesce, but have no desire to put out an expansive Setting PDF on it that no one wants to read. I think a simple Gazetteer focusing on the above, with maps, should suffice. Then six to eight Plot Points, with all the entail, for adventure.
At the moment, I am speculating on whether a Plot Point Zero adventure is in order? I think it would be interesting for the first adventure to be the 'lead-into the fall of Humanity' and have the Plot Point Setting Adventures lead up to that experience that the Players would have already experienced.
Thoughts on a Plot Point Zero for Humanity's Reign & Ruin?
Hopefully this is a beginning to an end...