This year's Arrowverse crossover event, "Elseworlds," is almost here, and it seems set to rock the Arrowverse to its core. Alongside the regular heroes from ArrowThe Flash, and Supergirl, the crossover will feature identity-swapped versions of Barry Allen and Oliver Queen and the return of John Wesley Shipp's Flash from the speedster's 1990s' TV show.

However, the event's biggest draw might just be the first live-action appearance of Batwoman, Kate Kane, who will be portrayed by Ruby Rose.  The annual crossover event will serve as a springboard for the CW to launch Batwoman into her own series, with the pilot rumored to start filming in April.

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Now, That Hashtag Show has released an alleged casting notice for the pilot that includes breakdowns for several characters who could be iconic Gotham City residents.The cast list describes six characters with names that are most likely covers, though the descriptions do point towards a few obvious character choices.

The first two characters mentioned come from Batwoman's world, with "Joseph" in place of her father Jacob Kane, "a former high ranking military Colonel." In the comics, Kane creates an army known as the Colony (the cast description calls them "the Crows"), which he trains using Batman's methods and techniques . Alice, high Madame of the Religion of Crime, and Kate's formerly-dead twin sister is also alluded to with the character of "Alexa." She is described as "Batwoman’s greatest enemy, basically her own personal Joker." Both Jacob and Alice were safe bets to appear on the series, though the inclusion of the Religion of Crime has yet to be confirmed.

Three other names on the casting breakdown could be characters with deep ties to Batman."Landon" is a tech-genius who "comes from an imperative legacy that has serviced the Caped Crusader with engineered gadgets," which sounds a lot like Luke Fox, son of Lucius Fox and the superhero known as Batwing.

"Sloane" is a Latina agent of the Crows who was at one time in love with Kate. While she was a Gotham City police officer and former superhero the Question in comics, this could still be a version of the fan-favorite Renee Montoya.

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Finally, the character of "Meredith" is described as an "airheaded amateur" with "a secret life of her own in Gotham City," that could tease Kate's cousin and frequent superhero partner Bette Kane, who's also the hero Flamebird. Meredith's mother "Charlotte" is also mentioned, though appears to be an original character for the pilot.

While the cast breakdowns aren't an official release, the characters tend to follow a certain formula that the CW has used with repeated success. And Batwoman has an established history with Flamebird, Batwing and Renee Montoya, which lends some credence to the report.

Batwoman will first appear when the three-night "Elseworlds" crossover begins on The Flash on Dec. 9, followed by Arrow on Dec. 10 and Supergirl on Dec. 11.