Every pony knows the old story how how we were once Nightmare Moon, threatening to bring all of Equestria into a time of Eternal Night. What every pony does not know is what was happening to us on the moon during that millennium where we were trapped on the moon. We are Luna, and this is the revelation of what is to come. Equestria will be run into great darkness and the world will burn.

(This is not at all related to future episodes of the My Little Pony. I'm just writing a story to make people wonder what might have happened during the millennium when Luna was cast to the moon as Nightmare Moon.)