This year's Arrowverse's crossover event titled "Elseworlds" gets a brand new trailer featuring Barry Allen (Grant Gustin) realizing that he's become the Green Arrow. Three out of the four DCTV series, ArrowThe Flash, and Supergirl (DC's Legends of Tomorrow skips the affair) come together for an epic small screen special that is also tipped to introduce fans to Ruby Rose as Kate Kane aka. Batwoman before she goes off on her own series. But while all eyes are on the newest hero on The CW block, there's also so much to look forward with regard to existing characters, particularly the Flash and the Green Arrow.

The first official piece of marketing material from "Elseworlds" was a poster featuring Gustin wearing the Green Arrow suit while Stephen Amell dons the Flash costume. Fans were quickly curious about what the Arrovwerse is up to this year and by the time set photos revealed the two actors wearing their hero-swapped suits side-by-side in what looks like a pivotal action set piece, interest in the narrative reached an all-time high. With the crossover nearing release, The CW is starting to ramp up its promotional activities for the annual special, the latest of which comes in the form of a new clip.

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The CW (via TV Promos) rolled out the second look at Arrowverse's upcoming crossover special featuring Barry's new life as the Green Arrow. In the clip, a disoriented Barry finds himself sparring with Diggle. As they continue with their training, he slowly realizes that he has the fighting reflexes of the Green Arrow. Considering that it seemed like they've been going at it with each other for quite a while, there's a good chance that the swap randomly happens which makes it all the more intriguing what triggers the phenomena.

The latest trailer comes on the heels of the first preview for "Elseworlds" centering on Oliver waking up to the Allen household and even sharing a kiss with Iris on the breakfast table. Comparing that from Barry's reveal, the previous trailer was definitely more uncomfortable to watch especially with Oliver's confused face throughout the whole thing until it dawns on him what's happening.

Obviously, the big swap between the Green Arrow and the Flash will be a central mystery in this year's Arrowverse crossover, but there's so much else that "Elseworlds" will tackle including shining a spotlight on Tyler Hoechlin's Superman. Aside from the possibility of seeing the Kent family farm in the special TV event, it will also debut  Elizabeth Tulloch as Lois Lane. An evil version of Man of Steel will grace the small screen as well with leaked set photos confirming a dark-suit-wearing Superman will factor in as a villain in this year's annual special.

More: Every Reveal From The Arrowverse Elseworlds Crossover Set Photos

The Arrowverse's "Elseworlds" crossover event kicks off with The Flash on Sunday, Dec. 9 at 8pm ET, then continues with Arrow on Monday, Dec. 10 at 8pm ET, and concludes with Supergirl on Tuesday, Dec. 11 at 8pm ET.

Source: The CW (via TV Promos)