Fan Casting My little Pony: Friendship is Magic 2: The Crystal Empire Phase 3, Movie 20

Twilight's Brother Shining Armor is getting married to her old foal sitter, Princess Cadence. But Twilight is upset she was not told earlier, she also expects that Cadence is not acting like her old self. Twilight gets suspicious, and during the wedding rehearsal, Twilight calls out Cadence. Shining calls her out and tells her not to show up to the wedding at all. When she begs for forgiveness from Cadence, Twilight gets sent to the underground dungeon beneath Canterlot. She then finds the real Cadence, And is told the other one is an imposter. It is really Queen Chrysalis of the Changling Empire. She has been using Shining Armor and sends her army to invade Canterlot. Princess Celestia is defeated, the elements are defeated. But Cadence and Shining Armor's love for each other defeats Chrysalis and her army. Canterlot is free, they get married, and Shining forgives Twilight. Meanwhile , Equestrian Soldiers find looks to be the lost Crystal Empire up in the North. And the Crystal ponies are alive but also the old dead King Sombra has returned to take over the Crystal Empire as well. He and Chrysalis team-up and plan to rule the Empire together as King and Queen. Twilight, her friends, and Shining and Cadence go there and find a way to defeat Sombra and bring hope back to the Crystal ponies.