You've seen this before, haven't you?
A human from a world menaced by an evil Equestria that seeks to convert and destroy the last remnants of humanity. He appears, bedraggled, tired, enraged, only to find himself in an Equestria much more like the one we know. A place of honesty, laughter, loyalty, kindness, generosity, and magic. A place that only the most bitter, joyless, mentally unbalanced misanthrope would ever think would dream of trying to destroy humanity.
You've seen a Lyra, fascinated by humanity, finding this human. You've even seen a passenger from this dark Equestria coming with this human, at least once.
But this time, things are different. The wrong humans have come to the right universes. And things will be forever changed. Jed R and Doctor Fluffy present to you, Unity:
The triumphant return of Convergence. For Jed, who deserved better than Red as a cowriter, for me so I can enjoy myself with one of the best friends I've ever made, and for you. For all the fans of Convergence that dealt with delay after delay, and my obsessive focus on Light eclipsing this when I was panicking, trying to get my story out before Spectrum inevitably collapsed.