I'm actually avoiding this synopsis. I do that sometimes. Even I attempt to avoid spoilers even with the constant flood of them in the EQD box.
The finale has been revealed! Head on down below the break for it, and discuss away~
Synopsis:
When the magic of Equestria mysteriously begins to fail, Twilight leads her friends on a quest for answers, leaving the School of Friendship open to attack from a dangerous mastermind.