The fall broadcast-network premieres wrap up with a pair of dramas featuring pop-culture heroines with some years on them: Batwoman dates to 1956 and Nancy Drew to 1930. These thoroughly updated versions (“Batwoman” premieres Sunday, “Nancy Drew” Wednesday) continue a CW trend toward female protagonists — about 80 percent of the dramas it’s introduced the last two years have centered on women. But it’s also lost “Crazy Ex-Girlfriend” and “Jane the Virgin,” so maybe the more significant trend is toward well-known franchises.

‘Batwoman’

The tireless producer Greg Berlanti now has six series on CW drawn from DC comic books, and he may have finally hit the point of diminishing returns. (If that didn’t already happen with “Legends of Tomorrow.”) This show about Bruce Wayne’s younger cousin, Kate Kane, who comes home to Gotham and dons the batsuit, has a generic quality — sufficiently well executed, with touches of quiet wit, but tinny and lacking in personality or excitement overall. It’s a superheroics delivery system, most notable for its efficiency.

Something similar can be said of Ruby Rose, who plays Kate with intelligence, physical grace and a modest share of severe charisma, but not much expressiveness — her excitement at discovering a cache of batweapons looks about the same as her surprise when she learns her former lover has married a man or her tearful anger during an argument with her father, Jacob ( Dougray Scott ). She’s an action star in a show that doesn’t emphasize action, giving more space, as is common on CW, to dysfunctional-family soap opera.

About that former lover: She’s a woman, and Rose’s Batwoman is being called the first openly lesbian leading character on a TV superhero show. (In the comics, Kate’s sexual orientation was retconned in 2006.) In the first two episodes — written by Caroline Dries, who, like Rose, is gay — the subplot involving Kate and her ex, Sophie ( Meagan Tandy ), is more credible and engaging in its limited screen time than the larger dramas involving the sister Kate lost as a child and the daddy issues she has with Jacob. (Tandy also provides some needed warmth and humor, as do Nicole Kang as Kate’s seemingly frivolous stepsister and Rachel Skarsten as the primary villain.)