In the episode “Invincible,” Zoom unleashes an army of Earth-Two metahumans on Central City — and the most motley crew is led by none other than Black Canary’s doppelgänger, the Black Siren (played by Cassidy). The photos suggest we’ll get some backstory on Zoom’s main meta-minions, seeing as both not-so-dearly departed Reverb and Killer Frost (played by Carlos Valdes and Danielle Panabaker) are featured.
Previewing Cisco’s reaction, for one, to laying eyes on a recently deceased friend, Carlos Valdes told TVLine, “Laurel’s death is pretty ubiquitous in this DC TV universe [so to see] a version of Laurel that’s alive, that does things to somebody’s consciousness, especially after processing grief. There’s definitely a bit of shock there and difficulty grappling with reality.”
Elsewhere in the penultimate Season 2 episode, Wally takes to the streets to help The Flash, which worries Joe, while Iris and Henry are concerned about Barry battling Zoom anew.