Before it appeared on the most recent episode of The Flash, Ace Chemical -- rumored to be a key location in the upcoming Suicide Squad movie -- had already made one onscreen appearance this year -- in Batman V Superman: Dawn of Justice.
The Chemical plant -- where The Joker was "created" in the comics -- had previously been spotted in viral campaigns for the movie. It appeared in a Turkish Airlines "Fly Gotham" TV spot as well as a map of the city provided on a Turkish Airlines viral website, and in a Time Out special, which we'll run down sometime soon.
Fans hadn't spotted it in the actual film, though, until this week when a Redditor who either photographed the screen at his local cinema or took a screen capture from a bootleg pointed out that the "Ace Chemical" logo can be seen in the Gotham skyline during the film's climactic battle with Doomsday.
The logo can be seen over Superman's shoulder as he flies, the Kryptonite spear in hand, toward battle with Doomsday in the final moments before both combatants are killed.
Fearing the actions of a god-like Super Hero left unchecked, Gotham City's own formidable, forceful vigilante takes on Metropolis's most revered, modern-day savior, while the world wrestles with what sort of hero it really needs. And with Batman and Superman at war with one another, a new threat quickly arises, putting mankind in greater danger than it's ever known before.