Princess Twilight has received a vision of Equestria's future, where friendship and harmony have been replaced by paranoia and mistrust and the various pony species have segregated into their own tribes. She will NOT allow it to exist.
During Equestria's annual royal summit, newly-met Shining Armor and Pharynx discover they have a fair bit in common, including a passion for homeland security, and an extremely dorky little brother/sister.
Twilight, Rainbow Dash, and Discord have escaped a painful fate through the use of Twilight's newly invented time machine, taking them into the distant past. Now they must find a way home.
Twilight has accidently sent Rainbow Dash to the past and now Rainbow lacks the means to return home. Fortunately, her friends are still there to help her find a way to return to the present.
Shortly after his wedding to Princess Cadence, Shining Armor opts to take some time to talk with Twilight. Both because he wants to know more about her life in Ponyville, and because he wants to apologize for being absent from her life for so long.
In an alternate ending of the episode 'Growing Up Is Hard To Do' , something goes wrong and the Crusaders are now stuck as adults. How will they deal with being children in older bodies, and how will their friends and relations react?
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.
(Story idea requested by A Man Undercover. Takes place before any events in Season 6.) Starlight Glimmer meets Discord for the very first time, and learns that they share the trait of being reformed villains.