We weren’t entirely surprised to find CBS getting in on the TV superhero game with Greg Berlanti’s development of DC’s ‘Supergirl,’ but the titular superheroine’s first casting rumor may yet surprise fans of The CW’s existing DC dramas. ‘The Vampire Diaries’ and spinoff ‘The Originals’ star Claire Holt is the first name tossed into the goblet for CBS’s forthcoming superhero series, but how likely is she to be our new ‘Supergirl’?

TheWrap first reported Holt’s potential consideration for the role, but Warner Bros. neglected to confirm whether ‘The Vampire Diaries’ star had indeed been tapped to audition for the role of the ‘Man of Steel’’s cousin. The series is also looking to cast Kara’s foster sister Alex, who skews more toward the scientific (cough, “Lex” stand-in) than her ‘Super’ counterpart:

For Kara Zor-El aka Kara Danvers, the show is eyeing Caucasian females, age 22 to 26, to play 24. As the series’ mythology goes, Kara at age 12 was sent from her dying home planet of Krypton to Earth, where she was taken in by the Danvers, a foster family who taught her to be careful with her extraordinary powers. After repressing said skills for more than a decade, Kara is forced to bust out her super moves in public during an unexpected disaster. Energized by her heroism for the first time in her life, she begins embracing her abilities in the name of helping the people of her city, earning herself a super moniker along the way.

The other lead role currently being cast is that of 26-year-old Alexandra “Alex” Danvers, Kara’s gorgeous, brilliant, science-minded foster sister. Growing up, Alex was partly jealous of her sibling yet also fascinated by her abilities, prompting Alex to learn as much as she could about alien anthropology, sociology and culture. Today, Alex works for a secret government organization and, alongside her heroic sis, will face many challenges, both mundane and super.

Here’s how CBS originally described the ‘Supergirl’ TV series, which seemed to suggest the existence of ‘Supermanmoreso than the ‘Supergirl’ supporting cast would conceivably allow:

Based on the DC Comics character, the drama tells the story of Kara Zor-El, who was born on the planet Krypton, but escaped amid its destruction years ago. Since arriving on Earth, she’s been hiding the powers she shares with her famous cousin Superman. But now, at age 24, she decides to embrace her superhuman abilities and be the hero she was always meant to be.

Arrow’ producer Greg Berlanti and ‘No Ordinary Family’'s Ali Adler will write the script and executive produce the hourlong drama through Berlanti Productions’ Warner Bros. Television-based banner, with Sarah Schecter also executive producing. As with DC’s approach to movies and TV thus far, the new ‘Supergirl’ series was originally thought to establish its own independent continuity, outside of ‘Arrow’ and ‘The Flash,’ or the inevitable ‘Justice League’ movie, though recent rumors have suggested that CBS might allow its Kara to co-mingle with subsidiary The CW’s Barry Allen and Oliver Queen.

Well, what do we think? Would Claire Holt make a fitting ‘Supergirl,’ whether or not CBS intended to connect the Super-drama to its CW cousins? Who do you have in mind for the role of Kara Zor-El?