MLP: FiM Season 3 Preview: The Crystal Ponies

It recently came to my attention, glancing at the Derpy Hooves Facebook fan page, that a sneak preview of the third season of My Little Pony: Friendship is Magic surfaced at Comic-Con last week in San Diego. As far as I can make out, Princess Cadence will have a big role. But what will become of Princess Luna and the beloved fan-favorite Derpy Hooves? We will see...