During the celebration at Twilight's new castle after Tirek's defeat, Twilight approaches Celestia with a question. The answer she gets is not what she expected at all.
Shining Armor isn’t convinced that Thorax can be trusted. In fact, he’s not so sure he can trust Spike or Twilight, either. Twilight might not be sure of anything anymore.
Sweetie Derelle, the alternate reality Sweetie Belle, has arrived in Equestria to save everyone. That includes driving a bus at high speed through Canterlot to make sure it doesn't explode. Also into Canterlot Castle. Specifically Celestia's Bedroom.
Rainbow Dash is a genius at messing up her life. While attending Junior Speedsters Flight Camp with her buddy Gilda, a new changeling student tries to be her friend. He's gonna wish he stayed home.
Vinyl Scratch and Octavia finally have comes to terms with living with each other. They have learned that they love each others company. While Octavia doesn't want anything to change Vinyl wants a foal.
Don't you hate it when some egghead tells you what's wrong with your life? Don't you hate it even more when she's right? Twilight Sparkle gathers her friends together and tells them what they don't want to hear. Which is the truth.