Set photos from this year's massive Arrowverse crossover, "Crisis on Earth-X," have begun to emerge in recent weeks, with the latest giving us the first look at Green Arrow's evil counterpart from the Nazi-ruled world of Earth-X.RELATED: Arrowverse’s Crossover: What is the Nazi-Filled World of Earth-X?Dubbed Prometheus-X, the villain may have a familiar name, but he won't be revealed as the other-dimensional incarnation of Adrian Chase, so don't expect former Arrow star Josh Segarra to be under the hood when he's eventually, inevitably unmasked. We know that Colton Haynes is slated to return to the Arrowverse this season, and while it's been widely presumed the actor will fill his role as Arsenal/Roy Harper once again, there's always a chance he could in fact be playing an evil version of Roy from another reality. The costume certainly does use a familiar red and black motif, after all. Then again, what if the Oliver Queen of Earth-X has fallen in line with his Nazi overlords...?

Titled “Crisis on Earth-X,” this year’s Arrowverse crossover will find “all of the heroes in town to celebrate Barry and Iris’s wedding,” when “villains from Earth-X crash the festivities with a deadly agenda.” The Earth-X villains are the evil doppelgängers of the Arrowverse’s beloved heroes, who in DC Comics history are from a parallel world in which Germany won World War II.

RELATED: Arrowverse Crossover: What To Expect From Crisis on Earth-X

“When we first did the crossover, I guess back in our third season and The Flash’s first season, it was very much like ‘It’s an episode of The Flash where I show up, and then an episode of Arrow where he shows up,'” Arrow star Stephen Amell said recently, describing just how big fans should expect this year's event to be. “And even last year, it was like ‘You know, Flash showed up on Supergirl, and then it was an episode of The Flash, an episode of Arrow, and an episode of Legends.’ But this year is just a four-hour movie.”

Last year’s Arrowverse crossover, “Invasion!,” brought together the stars of Arrow, The Flash, DC's Legends of Tomorrow and Supergirl for a story inspired by the 1988 DC Comics event of the same name.

This year’s four-part crossover will air across two nights, beginning Monday, Nov. 27, with Supergirl and Arrow (on a special night for one week only), and concluding Tuesday, Nov. 28, with The Flash and Legends of Tomorrow.