Faction: Celestia's Leigon - Led by an alicorn named Celestia, they have embraced the ancient way of the alicorns and diverted to ampllifying their magic 10 times their original power. They use this magic to forcefully capture towns and cities- Their goal being to recolonize Equestria in Celestia's image. (Chromia)
Faction: AliTech- Founded by original alicorn Princess Luna, it's main focus is robotics. Created through the technological genius of Lucifer, Princess Luna surpresses all other factions through a supercomputer her brain is connected to.
Luna, immortal as it is, must have suffered almost complete body destruction. So, she is basically recovering her body. (ShadowRaikou)
Faction: MST 'MultipleSpeciesCommand'- Having survived almost all odds, it is led by the rebellious Spike the dragon. Intent on purifying the wasteland and let plants flourish once more, they will do anything to get their hands on the Equestrian Garden Missile developed by Celestia. That is, if they ever locate the EGM. (Chromia)
Faction: HYDRA- With the same goals as before- World dominion and the wipeout of all unicorns and alicorns. (ShadowRaikou)
IC: In a garbage pile, a blue hoof stuck out of a canister. It is the middle of the day in the Equestrian Wasteland. Cloudy.