We have some great news about CBS' upcoming show "Supergirl." Creator Greg Berlanti (who is also the showrunner on "The Flash" and "Arrow") hinted that Kara Zor-El could be brought into the universes of Oliver Queen and Barry Allen.

Entertainment  Weekly (via JoBlo.com) wrote a piece on Berlanti and reported: "Later in the afternoon at his other office on the Warner Bros. lot, Berlanti meets with fellow producer Ali Adler and Oscar-winning costume designer Colleen Atwood to go over looks for their upcoming revamp of 'Supergirl.' The show will follow 24-year-old Kara Zor-El, Superman's cousin, and with a twist that could melt fanboy brains, Berlanti says it's possible this 'Supergirl' could enter the worlds of 'Arrow' and 'The Flash.'"

Last week, it was reported that casting was taking place to fill the roles of the two female leads, Kara Zor-El (Supergirl, who is known as Kara Danvers) and her sister Alexandra "Alex" Danvers. CBS also released character descriptions for the two leads.

Kara:

"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 to 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."

Alex:

"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."