It will be called Pony Atlas except it won't be because that's a stupid name. The six time periods will be Pre-Equestrian (Founders of Equestria), Pre-Classical (Pillars of Harmony), Classical (Diarchy), Industrial (A Hearth's Warming Tail), Late Celestian (G4 pre-S9E26), Post-Celestian (G4 S9E26). Except that there really needs to be a sense of decay towards the end or else the overarching themes don't really work hmm.

Nah maybe this is a dumb idea.