Background Pony #B612

I can imagine a premise where Velvet acquires the cure to Twilight's condition early into the episode and the conflict is that she withholds it because she loves having her little filly back. Adorable shenanigans ensue, inter-cut with scenes of rising tension as Equestria feels the effects of being without their Princess of Friendship. By the end she learns some kind of lesson about letting go and allows Twilight to return to being a mare and a princess. Twilight can't find it in her to be mad at Velvet for long and with a wink reminds her that she'll always be her princess, and roll credits.