My Little Pony Friendship is Magic will have it's sixth season in 2016.
Fluttershy's brother will emerge as a leading character in season 6, being the younger brother of Fluttershy herself.
Fluttershy's brother will make his first appearance when the cutie map in the Friendship Rainbow Kingdom castle sends Twilight Sparkle and Fluttershy to Cloudsdale where Fluttershy's parents are getting divorced and they are fighting over who should be the legal guardian of Fluttershy's kid brother. In a brokered compromise, Fluttershy and Twilight become the legal guardians of Fluttershy's brother, he comes to live his older sister in Ponyville, and Fluttershy's mother (a member of Cloudsdale's ruling council) and father (a worker in Cloudsdale's weather factory) are both granted visitation rights.
Scootaloo tries to become the girlfriend of Fluttershy's brother.
Discord becomes a close friend of Fluttershy's brother. In one episode, the dracoequus and "Flutterbro" go on a journey across Equestria, though this angers Fluttershy and Twilight, not to mention both of Fluttershy's parents, who make an appearance.
Fluttershy's brother likes Pinkie Pie's parties, but dislikes being in the receiving end of her hugging!
Fluttershy's mother is revealed to be a close friend of Princess Celestia.
Rainbow Dash's grandmother is revealed to have been a member of Cloudsdale's ruling council.
Fluttershy's uncle (her father's brother) is revealed to be the captain of an airship (see list of transportation forms) that carries, among other things, mail for the Equestrian Postal Service.
In the final two-part episode for season 6, the Mane Six and Fluttershy's brother visit the Crystal Empire when King Sombra returns with an army of shadow ponies. Fluttershy's brother rescue's Princess Cadance's baby Alicorn daughter from Sombra and Cadance, her daughter, and her husband Shining Armor combine with the magic of love to banish Sombra and his shadow ponies.