EDIT EDIT: This story is now cancelled but holds possibility in the future of being revised and overhauled.
EDIT: This is my first fanfic, I would please like for anypony to give me constructive criticism so I can write the rest of the story in a higher quality! This story is going to take a while for me to finish, so there's lots of time for me to improve on it.
By the power of the Elements of Harmony, Nightmare Moon had been cast out from Princess Luna and peace was restored to the land...
But what if the Elements had not been enough to defeat her?
The year is 2000, around the time of the Summer Sun Celebration after a millenium of peace and prosperity. On what was to be the brightest day in Equestria, the stars aided in the escape of Nightmare Moon from her Lunar exile, throwing Equestria into a dark and everlasting night. The Elements were scattered by Nightmare Moon before the friendship of the Mane 6 could fully utilize them, and thus Equestria was claimed by night.
With her solar highness missing and presumably dead, the citizens of Equestria had no choice but to kneel in terror in front of their new soveriegn.
A century passes. In Ponyville, a group of friends had been wandering around past the ridiculous curfew that had been set since the beginning of the Lunar regime when some of Nightmare Moon's guards had come across them. Alarmed, they each ran off in a different direction, promising to see each other the next day.
One of these friends, a unicorn named Artemis was in the middle of making his escape when he came across a small cave. He dove in to take shelter for a while when he stumbled across a discovery that would change his life- and possibly those of every pony in Equestria- for the better.
Inside the cave, he discovered the Celestial Tomes - books that outlined the entire fate of Equestria. Within these mystical pages, the young stallion discovered a way of ending the eternal Darke and bringing sunlight back to all of Equestria...