With comic book superhero series already in the works at all the other broadcast networks, CBS has decided they'd better get in on this too, just in case broad multi-camera sitcoms and crime procedural spin-offs should ever wane in popularity. They're ushering in a new era in which girls no longer need be broke with a series commitment to Supergirl, created by No Ordinary Family writer Ali Adler and Arrow/The Flash's Greg Berlanti. Like in the comics, the focus will be on Kara Zor-El, Superman's cousin who it turns out also managed to get off Krypton and make it to Earth--much as both NCIS and NCIS: Los Angeles escaped JAG to also find their way to the CBS lineup.
While CBS's "commitment" to go to series doesn't necessarily mean the show actually will, it does give it a lot better chance, as the network will have to pay a hefty penalty should they back out. And they need that money for CSI: Dogs.