A new series is starting up soon with a Pilot Chapter being released first to see what the response is before I devote more time to it. As you can see, it's heavily-inspired by Friendship Is Optimal (a story which I'm halfway done reading) with no connection to it whatsoever. Celestia's reasons for what she's doing is completely different than FIO so there'll still be that mystery to discover, in addition to the mystery of the main character's backstory.