Look at the director's resume. With characters like Red Sonja,Vamparella,Razor,Witchblade,Shi and Danger girl sex appeal is a big part of them.
You can't go the Captain Marvel or Birds of Prey route with these characters.
Also Gail Simone is involved i find her comics overated.
The director M.J. Bassett actually said that she will retain the metal bikini in the movie.
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The sheer variety of stories that surrounded Sonja gave Bassett carte blanche to pursue her own vision. “She was a blank canvas,” Bassett says. The one constant was the chain-mail bikini that had helped earn Sonja the title of sexiest woman in comics, according to Comic Buyer’s Guide, in 2011. “It’s preposterous,” says Bassett. “She became a character for prepubescent 13-year-olds that was never accessible beyond.” Bassett grins, sips her cocktail, then quickly self-corrects. “I mean, I loved it!” For the record, Bassett’s Red Sonja is keeping the chain-mail bikini.
During casting, Millennium reached out to Game of Thrones’ Hannah John-Kamen to play Sonja, but Bassett decided to go with an unknown instead. She chose the Italian American actress and model Matilda Lutz, whose natural sincerity and warmth appealed to Bassett. “She’s a beautiful, feisty, tough, committed young woman who people are going to want to watch,” Bassett says. Lutz, who gained 13 pounds of muscle for the role, says, “Every day it’s either climbing or horseback riding or fighting.” As she understands her, Red Sonja is a “woman alone in the world, trying to survive in a very crazy environment.”
Bassett’s script, which she rewrote half a dozen times, steers clear of sexual politics and gender. Curious and friendly in person, Bassett also is direct. “I didn’t warm to the previous script, which was much more sexual politics,” she says. “Obviously in my personal life I’m interested in that. But as a storyteller I don’t think it’s interesting.” She also eliminated a key plot point from the original 1985 film: Sonja’s rape by marauding enemies. “I have no interest in fictional women who use [rape] as an engine of motivation,” she says. “It’s not a strong motivation. She’s just a human being in the world of femininity.”