If all the good guys are evil over on Earth-2, does that mean that all the bad guys are heroes? Is there are a version of Manu Bennett's Deathstroke that saves cats from trees and pulls people from burning buildings? Likewise, is there a version of Malcolm Merlyn that's actually protecting Star City instead of trying to destroy it? We saw a version of this with Michael Rowe's Floyd Lawton, who was a Central City police officer on Earth-2. Perhaps the key to defeating Zoom will be gathering the heroic versions of the Rogues?
So many questions but with only two episodes, we'll probably not have a lot of answers, at least not this season.
UPDATE: 2nd Clip added via The CW.
KATIE CASSIDY GUEST STARS AS BLACK SIREN – After Zoom (guest star Teddy Sears) unleashes an army of Earth-2 meta-humans on Central City, Barry (Grant Gustin) is shaken when he sees their leader is the Black Canary’s Earth-2 doppelganger, the Black Siren (guest star Katie Cassidy). Meanwhile, Wally (Keiynan Lonsdale) takes to the streets to help The Flash stop the meta-humans, which worries Joe (Jesse L. Martin). Iris (Candice Patton) and Henry (guest star John Wesley Shipp) are concerned about Barry taking on Zoom. Jesse Warn directed the episode with story by Greg Berlanti & Andrew Kreisberg and teleplay by Brooke Roberts & David Kob.