After a new spell gone wrong, Twilight Sparkle and Spike are sent ten years into the future. They arrive in a devestated state of Ponyville, and find all their friends seperated without Twilight, having all met unfortunate fates.
Twilight and Spike can't find a way to reverse the spell. But while Twilight is slowly losing her sanity, Spike is determined to find a way to change everything back to the way it was.

I wanted to try the Bad Future trope using this show. It's probably been done before, but I'm still going to try to write this.