The CW this morning debuted the first teaser image and synopsis for "DC's Legends of Tomorrow," revealing the much-speculated costumed identity of "Arrow" alum Caity Lotz.

Scheduled to premiere as part of the network's midseason lineup, the eagerly anticipated "Arrow"/"Flash" spinoff stars Brandon Routh as Ray Palmer/Atom, Wentworth Miller as Leonard Snart/Captain Cold, and Dominic Purcell as Mick Rory/Heat Wave, Ciara Renee as Kendra/Hawkgirl, Victor Garber as Professor Martin Stein, Arthur Darvill as Rip Hunter ... and Lotz as White Canary.

Lotz of course played Sara Lance on "Arrow," assuming the costumed identity of Canary until her murder at the direction of Malcolm Merlyn. Fans will have to wait until at least early 2016 to learn how she returns as White Canary.

Here's the official synopsis for "DC's Legends of Tomorrow":

When heroes alone are not enough... the world needs legends. Having seen the future, one he will desperately try to prevent from happening, time-traveling rogue Rip Hunter is tasked with assembling a disparate group of both heroes and villains to confront an unstoppable threat - one in which not only is the planet at stake, but all of time itself. Can this ragtag team defeat an immortal threat unlike anything they have ever known? DC'S LEGENDS OF TOMORROW stars Victor Garber ("The Flash," "Alias"); Brandon Routh ("Arrow," "Superman Returns"); Arthur Darvill ("Doctor Who"); Caity Lotz ("Arrow"); Ciarra Renee ("Pippin"); Franz Drameh ("Edge of Tomorrow"); with Dominic Purcell ("The Flash," "Prison Break"); and Wentworth Miller ("The Flash," "Prison Break"). Based on the characters from DC Comics, DC'S LEGENDS OF TOMORROW is from Bonanza Productions Inc. in association with Berlanti Productions and Warner Bros. Television, with executive producers Greg Berlanti ("Arrow," "The Flash," upcoming "Pan"), Marc Guggenheim ("Arrow," "Eli Stone," "Percy Jackson: Sea of Monsters"), Andrew Kreisberg ("Arrow," "The Flash," "Eli Stone," "Warehouse 13") and Sarah Schechter ("Arrow," "The Flash," upcoming "Pan").