A day before Sombra's and Chrysalis's wedding, and Sombra feels a dark power outside of their home.

Realizing this could aid them in having their revenge on the ponies that killed him and most of her children, they agree to venture out and find the source.

But when they arrive, they realize that a lot of things have changed. They have been forgotten, the ponies seem to be more afraid of this centaur like creature, their mortal enemy is an alicorn now, and no one seems to care that they're trying to take over Equestra again.

Author's words with notes in them: An idea from a friend of mine when he showed me zis picture.
As usual, editing by Alticron,
and now with that space stuff between the paragraphs.