1: Sienna: an intergalactic treasure hunter and space plunderer has come to United Equestria seeking a hidden power which she plans to use to conquer the universe, which prompts the ponies to seek out this treasure by hunting for clues left by Celestia and Luna's mother.
2: Applejack's family, or rather all ponies are threatened by a swarm of Vampire Fruitbat Hybrids that plan to turn all ponies into Bat hybrid creatures in an act of settling an old score.
3: An old pony guard who once served Queen Galaxia is found frozen form long ago. He is revived, but has a very hard time adjusting to the new times and surroundings.
4: Applejack and her family are feeling a bit down missing their folks, Pear Butter and Bright Mac, until a bit surprise comes to them
5: Lightning and Starla's baby is born.