After 1000 years, Nightmare Moon has returned!

Now she shall plunge the world in everlasting night! Plant life grows wildly, animals prowl the woods, soldiers are better trained and equipped, everyone can speak freely, eldritch horrors are destroyed on the spot, the economy takes an unexpected boom, and Equestria becomes an even more diverse and friendly place to be.

...Maybe we were wrong about Nightmare Moon the whole time?