Every story needs a good villain. That villain is you. Equestria has gone on for too long in peace and happiness. Now is the time to destroy and/or conquer this land. Now is the time for darkness, and misery. Now it is your time, Dark Lord.
You are an ancient god who dates back to times of the beginning. However you have been lost to time due a major wound that you had gotten a long time ago, turned you into stone. A few thousand years have pasted and you're now reintroduced to the
You, Anonymous, has an invitation beyond Cloudsdale. A place called, Skyworld. The most nicest place, no disease, and nice fellow ponies. Well, was nice, until you enter. Now, the entire world chasing you and your friends down, will you escape?
A year has past since Anon's depature, yet upon a suprise return, the situation in Equestria isn't the same comforting feel he had when he left; something new and sinister is a'hoof.
A Russian tank crew is somehow teleported to Equestria and first encounters are bumpy at best. When the tank crew loses a key part to their team, they are aided by the most unexpected ally they could find.
A Juggernaut wakes up in a crashed ship, and makes it his goal to kill as many enemies as he can before he falls. Nobody is more surprised than he when something other than enemy soldiers are waiting outside...
Big N' bad you are. You have to be being the Apex predator of your area. But whats a vicious predator such as you to do when a small filly doesn't fear you?
When a legend is transported into a new world in the midst of his greatest moment, how does the dragonborn adapt to his new life? (2nd person. Gender, name, race, and fighting style are up to you)
Five years ago, The Rainbow Factory was condemned by Princess Celestia and many questions were left unanswered as to why. Now, as a filly, starting your first year in flight school, your classmates decided to give you a test to prove your worth.
I am a changeling. You can hire me to do pretty much anything, espionage, assassination, body double, anything. Pay depends on the the job. Just not prostitution. Trust me, you don't want it.
Running from your past, you end up in Ponyville to start your new life. After shortly arriving you meet a very beautiful rainbow haired girl and you slowly fall in love.