This is very cool!
I'll have to think about it some more, but I think I might make it canon in my home game.
I presume that the elemental planes are the result of the very early developments, pre-life? (or when life was extremely simple).
And given the current meta-plot, thoughts on the origin of Dis? I'm thinking perhaps from one of the earlier cycles that overlapped hominids (pre modern humans). (although various books give conflicting descriptions of them, so it is not entirely clear)
(also, if you put it on Holostreets, I will buy it at some point. Like with Fastjack's Shadowfiles, good meta-products are worth supporting!)