In an age of unrest and inter-tribal tension, Twilight Sparkle flies to Cloudsdale to talk down a faction of radical young Pegasi. It would be a lot easier if their leader hadn't been petrified for fifty years.
Equestria has been granted unlimited electricity thanks to Flim and Flam's changeling batteries. Cadance isn't okay with abusing love to power a modern Equestria. Shining Armor can't let her destroy it all. Only one gets to win.
The spell trapping Nightmare Moon within the orbital satellite is tampered with, pushing her release past a thousand years into a time where alicorns are myth, technology has somewhat stagnated, and nobody knows who she is.
Trapped in a dark realm for thousands of years, one of the deadliest villains known to ponykind resides, waiting for the perfect opportunity to rise once more and take over the Land of Light. His time may come sooner than he realizes...
Chrysalis is beaten. Her invasion of Canterlot? Failed. Her hive? Scattered to the winds. The future of her people? Bleak, grim, and hopeless. But change is in the air, and something is calling Chrysalis north, to the birthplace of the changelings.
Ponies at school say that there's a cave full of treasure close by. All you have to do is go in and get it. And make sure the Bug Queen doesn't catch you while inside.
Tracy needed somewhere to stay, how was he supposed to know that it was in another universe? Now he'll somehow have to hold down a job on Earth while living as a pony in Equestria. It's either that, or say goodbye to being human.
Queen Chrysalis accidentally Reformed, and now needs a vacation to sort things out. Ocellus and Smolder are summoned by the Cutie Map to solve a friendship problem. Surely these two things are unrelated. Surely.