Michael Rowe, who plays Deadshot on Arrow, just posted a behind the scenes picture of the Suicide Squad with a certain Gotham villainess. We got our first glimpse of Harley Quinn in the episode Suicide Squad which aired back on March 19th. She was played by Cassidy Alexa in that episode but voiced by Tara Strong – who also voices Harley in the Batman: Arkham video games.
While there has been no official announcement about the character joining the show on a more regular basis, at least fans get a full shot of Harley to mull over.
Source: Michael Rowe