>>28699
Would filly be a little sister? Her daughter? Just some starstruck filly that latched onto her? Although that one might just overlap with the sister angle, in the RD, Scootaloo kinda way.
Sister would probably have had the most posibility if being greenlit, but I can't imagine the immediate setup that would make it. "I'm sending you to ponyville, oh and bring your little sister."
Daughter would be the most interesting, would be lovely to see, also having an active motherly angle in a show like this. Would personally still prefer the single mother angle, just Twilight and her filly, but I can already imagine the field day the obsessed
religious/conservative part of the fandom would have with that.