Barbara Minerva was featured in the seventh issue of the Perez run. The New 52 solo book is the only time in history where the Greek myth villains were the only ones used (unless you count First Born and Cassandra the Mad who aren't from the myths). Yeah Circe became a major contender but let's not kid ourselves; DC will always push Cheetah over her. Dark Angel is more a Donna Troy villain than a Diana one and Circe simply has more clout as a villain than White Magician and Queen of Fables (the latter of whom is also a public domain character).
You're right she wasn't. My mistake. Still, she was a part of the story that turned Vanessa into a new Silver Swan, so her absence from this film seems odd to me.