Man goes to convention dressed as multiple characters at once. Man purchases a Twilight Sparkle mask. Man regrets his decision as he ends up in a Pokemon-filled Equestria as another Twilight Sparkle. And then, something unexpected... Dawns.
After buying a Sinestro Corps ring at from a vendor at ComicCon, Simon Jones is Displaced as a Sinestro Lantern version of Hal Jordan, and becomes the resident anti-hero of Equestria.