Trixie, lightning dust, cheese sandwich, seabreeze, flim/flam, and the antagonist from the Manehattan episode? Each corresponds with a different character.
Ok. First of all, (and this is a long stretch) remember those April fools youtube videos made by brony reviewers? What if the joke was that that actually would happen? For those who haven't seen them:
1. Kimi sparkle (parody reviewer) gets speaking role
2. Pinkie pie gets in a relationship
3. Luna becomes nightmare moon again (willingly, to fight an enemy)
It is far fetched, but possible.