Just because everything worked out in the end, doesn't mean that things went well.

Driving into another dimension isn't something one can plan for.

Nightmare Moon had finally broken free of her prison. It was time to get her revenge on Celestia and bring about night eternal. Six mortal ponies rose up to stop her, using the power of the Elements of Harmony.

Rainbow Dash heads off to a tournament.

Luna has detected something on the outer edge of the solar system, heading inward. Something she doesn't control, and it seems to be slowing down.