As someone deeply invested in the WNBA—especially living in Las Vegas, home of the reigning champions—I was primed to appreciate “Unfinished Business,” Alison Klayman’s detailed look at the Women's National Basketball League. The film offers an extensive account of the league's history, its challenges, and its successes over a quarter-century. It follows the 2021 season of the New York Liberty, one of the WNBA’s orig…