According to thathashtagshow.com these are the series regular casting call. Note, the characters are code names, but, let's face it, it's got to be Nightwing, Raven, Starfire, and Changeling/Beast Boy.  Interestingly enough, Beast Boy could be Asian in the TV show.  I'm okay with that!

[John Crossland] Male, late 20s-early 30s, Caucasian. Equal parts charm and impenetrability, John is a cop. He has a nice smile, tired eyes and a cool, distant manner. However, when provoked, his eyes are so lethal “they drain a man of every last bit of spleen.” John is haunted by the murder of his family. Unbeknownst to those around him, he is also a vigilante. In the shadows, he fights with the commitment and conviction of an artist, the brutal grace of a dancer. Mentally and physically, he is covered in a map of scars. And though he fights to escape his past, it is often a losing battle…SERIES LEAD

[SARAH] Female, Mid teens, Open Ethnicity. Troubled, bullied, often scared but unwilling to show it, Sarah is a loner more comfortable hiding in her hoodie than making friends. Haunted by a dark force inside her, Sarah experiences violent episodes that she cannot understand or control. She is also plagued by recurring nightmares that lead her across the country in search of help…SERIES REGULAR

[Casey] Female, 20s, Open ethnicity. Casey is a tall, stunning woman, her beauty so magnificent it’s almost inhuman. Elegant, refined and mysterious, she is on the hunt to discover who is trying to kill her and why. And those after her are in for a surprise because she’s more deadly than anyone they’ve ever encountered…SERIES REGULAR

[JAX] Male, Mid-late teens, Open Ethnicity, Asian preferred. Funny and charming, this amateur thief’s humor hides his insecurities and past pain. Not the toughest kid on the streets, he’s learned to survive in the world with his wit and quick-thinking…SERIES REGULAR

Only problem was DC wouldn't give him the JLA book....

[ Read more on syfy.com ]

This story first appeared in the June 20, 2017 issue of Variety.

Jon Berg and Geoff Johns are riding high. The two men, whose job is to oversee the DC film universe for Warner Bros., are basking in the glow of the critical and commercial success of “Wonder Woman.” Berg is a veteran producer whose credits include “Elf” and “Out of Time,” while Johns is deeply enmeshed in DC lore, having written for the likes of “Green Lantern” and “Aquaman” in addition to guiding the company’s television efforts.

(excerpt)

Will Patty Jenkins be back to direct the sequel to “Wonder Woman”?
Johns: Patty and I are writing the treatment right now. The goal is to make another great “Wonder Woman” film. I had a blast making it with Patty the first time. We’ve got a cool idea for the second one.