Friendship is Magic: Exists as an alternate earth in the YW universe?

[Romaji]

I've thought about this idea for a while, but I would like to see if anyone else thought of this, or their thoughts on it.

From the first book, this quote sparked my idea. (bold added)

She learned the Horseman's World, which gets the attention of any member of the genus Equus, even the zebras;

I made the jump to Equestria being the Horseman's World, and fitted Discord to The Lone Power (both have been redeemed once (Discord's only friend he ever had is Fluttershy), represent disorder and chaos, and can never be truly defeated.).
Thoughts?

[Romaji]

also, All ponies have the manual in them, and when they find out what part of the manual theirs will focus on.