https://www.tvguide.com/news/supergirl-ep-explains-the-empowering-theme-of-the-final-season/

Showrunners Robert Rovner and Jessica Queller also tease a new villain, who "is unlike anyone we've had before." ALSO: Melissa Benoist talks the many iterations of this season's storyline due to the pandemic and her maternity leave. (https://ew.com/tv/supergirl-melissa-benoist-season-6-premiere-phantom-zone/)