Remathilis
Legend
That is exactly the structure of the product(s) I want to create for my homebrew setting.
I've become a fan of the "setting in a box" method; having one kingdom/region detailed and then stitch them all together. A failed homebrew world I tried to do was basically that: it stitched the Nentir Vale, Elsir Vale, Barovia, Thunder Rift, Punjar, Hollowfaust, Freeport, and the Valley of Obelisk's all together in a chaotic mess. Didn't get to do what I wanted with it (due to unrelated problems) but the idea of a Frankenworld made of up of other campaign settings does have merit.