The greatest trick the Great and Powerful Trixie ever performed was convincing all of ponykind that she was a mere unicorn. Years later, Princess Celestia and Trixie have a discussion by Twilight Sparkle's grave.
Following the final Magic Duel, Ponyville holds Trixie in custody until she can be attended to by one of the Princesses. However, when Celestia arrives with Prince Blueblood in tow, a shocking truth awaits the residents of Ponyville.
After being banished, Nightmare Moon finds she is able to talk with Discord, also sealed away. The two despise one another, but talking with a hated foe is better than endless monotony. Over time, the two fall in love, up until tragedy strikes.
Saitama wakes up bored one day, only to find a portal in his room. Being Saitama, he walks straight through it. In the new world, he meets a young filly name Lily Longsocks who is as strong as he is. Of course they get into a fight.