A lengthy theory on the nature of the Elements of Harmony, based solely on the given facts that the Elements of Laughter and Love utilize Chaos magic.In addition to the two known Chaos Elements, Laughter and Love, the Element of Hope also runs of Chaos magic. All three are wild and almost impossible to stop with logic alone. Laughing in the face of danger, hoping against all hope, and any number of things associated with love are all downright chaotically insane. But as Discord said, Harmony needs Chaos and Order to stay balanced. Enter the three Law Elements: Honesty, Loyalty, and Truth. Unlike their wibbly-wobbly counterparts, these three are concrete. They deal with facts and words with little-to-no wiggle room or grey areas. Either you are, or you aren't. But wait, what about the other three? The "final" three Elements, The Elements of Kindness, Generosity, and Friendship(works better than Magic for this) exist solely to bring joy to others' lives. They don't wander particularly far into the realms of Order or Chaos, and thus don't upset the balance of those six Elements, but they are definitely at a noticeable extreme of a certain other scale. As you can probably already guess, my belief is that these Elements utilize, for lack of a better term, Good magic. But remember, balance in all things. That means there are more Elements. Specifically, the three Evil Elements; the Elements of Hate, Betrayal, and Terror. These three should be considered Elements of Harmony in only the strictest sense. They do not work well with the others. They do not particularly like the others. In fact, their sole purpose is to counteract not just the Good Elements, but the other six Elements as well. Why, you might ask? Because balance in all things, even balance. When the majority of active Elements work together, as they have been since Discord was first kaput, they can do pretty much anything they want. Sound balanced? No? Didn't think so. That's where these rabid puppies come in. Each one is used to whack out a different set of Elements. Betrayal ends Loyalty, shattering Trust and rendering Honesty meaningless. Hate breaks Friendship, burns out Kindness, and drains Generosity dry. Terror strangles Laughter, crushes all Hope and when strong enough can even rend Love asunder. Yeah, they balance out against balance. It's that deep. And you know what else? All three of them have been right under our noses since Chapter 3. Hate turned The Doctor into a psycopath and Cheerilee into a walking plant shop of horrors, Betrayal struck out against Loyalty everywhere and made not one, but two ponies go against their allies (even if one didnít want to and the other was too stupid to know at the time), and Terror brought to Ponyville a curse worthy of its Element, unleashing death itself upon the unsuspecting ponies. The Masky Ponies are Elements of Harmony, striking out against the Elements of Harmony to bring Harmony back to the Elements of Harmony by breaking the Bearers of the Elements of Harmony so the real Elements of Harmony can stop working together and return to Harmony. The main problems with this are 1) Everypony likes the current massive imbalance towards Good, and 2) Slendy hates Harmony of all kinds and is manipulating the isolated Evil Elements just to watch the world burn. To tie everything together, I've even figured out who the dark (marginally blacker?) human bearers of the Evil Elements are. Grey Mann is Terror, with his robot army and willingness to work with a Slenderman, the Administrator is Hate because fuck the Administrator, and Betrayal is held by the most despicable backstabber in the history of creation: Engie's ex-wife Irene.
The Mysterious Hoody Pony is actually...
There is actually a good reason for Nightmare Moon giving all the Light Elements of Harmony Nightmares...
Engie will build a mechanical hoof to replace Rarity's missing leg.
Actually, it's Celestia's fault that Sunnytown killed it's residents after acquiring their cutie marks.
David Tennant is not a code name.