I now assume that the male pony who is Fluttershy's sibling will NOT appear in Brotherhooves Social, since that presumably will focus on Big McIntosh and Apple Bloom.

So, will "Flutterbrother" become a close pal of Discord? After all, of the Mane Six, Discord is closest to Fluttershy. Having "everypony's" favorite draconequus team up with Fluttershy's bro could be interesting.

To add a little bit more, Discord donates a little bit of his draconequus magic to "Flutterbrother" as a gift, and the duo of pony and draconequus team up in the two-part Season 5 finale and help to defeat Starlight Glimmer.

Of course, Princess Celestia and Twilight Sparkle force "Flutterbrother" to give up his magic at the end of the episode.

Could one of the characters that appears in My Little Pony Equestria Girls: Friendship Games be "Flutterbrother?"