The shows were not renewed for an additional season. Caity Lotz is the only original member of the show's original cast, and it has been a part of the Arrowverse for seven seasons. One of the best things about the Arrowverse is that it has always been fun and willing to experiment with itself. Not many superhero shows feature a psychic gorilla trying to kill Barack Obama in the 80s, and they wouldn't devote part of an episode to turning one of the leads into an animated Disney princess, complete with a musical number and magical objects to cheer her on. The cast and crew of the show, as well as the fans, were thanked by co-showrunner Keto Shimizu.
Ruby Rose's Kate Kane was introduced in the Elseworlds crossover in the year 2019. At the end of the first season, the show pivoted to the original character, as played by Javicia Leslie. Ryan stepped in as the Caped Crusader after Kane was presumed missing, and the show later wrote around Rose's departure by bringing on Wallis Day to play Kate for the remainder of the second season. Rose gave allegations of the conditions behind working on the show, including sexual harassment and unsafe working conditions, as the recently concluded third and final season was airing.
The creators of Batwoman took to social media to show their love for the fans. It was an honor to play the character for two seasons, and it was a pleasure to create the series. Other actors, including Camrus Johnson, took to social media to post set photos and give their own condolences.
There are two Arrowverse shows that are still going on, The Flash and Superman and Lois. The ninth and third seasons of those two shows have already been locked in, so we may see Ryan or the Legends in one of them. The CW's status as a network may be uncertain, but they're not giving up on DC just yet, with another Batman series in the works.
Deadline has a story on it.
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