New Delhi, June 27 -- Not too long after James Gunn and Peter Safran stepped up to lead DC Studios into the future, they were riffing about Supergirl. The Tom King comic series, "Supergirl: World of Tomorrow" was one of the ideas they were especially excited about, and Gunn had a very specific image in his head.

He just didn't yet know her name.

"He goes, 'you know the young girl from 'House of the Dragon'? The young queen or princess? That's how I picture it, like a young punk rock girl who is just totally badass and tough,'" Safran told The Associated Press. "I was like, yeah, that sounds fantastic, and we haven't seen that before."

Milly Alcock, now 26, had just started to break out playing Princess Rhaenyra Targaryen (later portray...