Actor Stephen Amell arrives at the 2014 People's Choice Awards in Los Angeles, California January 8, 2014
Actor Stephen Amell arrives at the 2014 People's Choice Awards in Los Angeles, California January 8, 2014. REUTERS

"Arrow" Season 2, Episode 16, titled "Suicide Squad" airs on Mar. 19 on The CW. There is no new episode this week. But the DC Comics adaptation will soon return with Deadshot, Bronze Tiger and Shrapnel in one special episode. Fans are hoping to see Oliver Queen (Stephen Amell) with Harley Quinn, too.

Watch the promo video for Arrow 2x16 and spot the blonde girl in pigtails wearing an A.R.G.U.S. (Advanced Research Group Uniting Super-Humans) shirt. Her back is on the camera, but rumours say this character is indeed Harley Quinn, a popular Batman villain. The actress reportedly playing the role on Arrow is Cassidy Alexa.

She is in the Arrow Season 2, Episode 16 promo video for a second. No Arrow insider has spoken of her. But some fans have been sure she is Batman's Harley.

Cassidy Alexa happens to be a ballerina, her Twitter profile says so. If she is playing Harley Quinn, then Arrow executive producer Marc Guggenheim and the showrunners must have thought this through.

Comicbook.com reached out to Guggenheim to get the real score. But the EP would not spill, at least not too soon. He just teased a special announcement coming up on Arrow Season 2, Episode 19. (Remember when Stephen Amell teased major action stunts in Episodes 13, 14 and 15? He was not lying.)

Meanwhile, Olicity fans are still grinning over something that Oliver Queen told Felicity Smoak in Arrow Season 2, Episode 14: "You will always be my girl." But that would be set aside for now.

"A.R.G.U.S. recruits Diggle (David Ramsey) to take down a former acquaintance who is now planning to take over Afghanistan," says the Arrow 2x16 synopsis on TV.com. Dig would later realize that he will be working with Deadshot (Michael Rowe), Bronze Tiger (Michael Jai White), and Shrapnel (Sean Maher) - big bad villains he has helped put away. It looks like Dig's ex-wife Lyla (Audrey Marie Anderson) will also be in the "suicide squad."

Felicity is not keen on supporting Dig's decisions, but at the end of the day, Team Arrow is solid. The CW viewers will see on Mar. 19 whether Oliver Queen, Sara Lance aka Black Canary (Caity Lotz) and Roy Harper (Colton Haynes) will assist the suicide squad.

Is Harley Quinn Appearing In ARROW S2E16 "Suicide Squad", Played By Cassidy Alexa? http://t.co/SEpNgiDbtW http://t.co/AfNLXuEt3I

— DCU Movie Page (@dcumoviepage) March 9, 2014

Twitter has been busy getting updates on Arrow's Harley Quinn. Based on social media posts, many curious Batman and DC comics fans will be watching Arrow Season 2, Episode 16 - and it will be their first time to see Oliver Queen on TV.

Looks Like Cassidy Alexa (@cassalexa) May Just Be ARROW's Harley Quinn After All http://t.co/ySHLx3Lvnb — Cody Ferrell (@TheThorverine) March 7, 2014

It has been confirmed that Cassidy will be in Arrow. What's under lock and key is the role she is playing. For how many episodes will she be on the show (which happens to be filming in Vancouver)? This could be a clue:

see ya soon vancouver pic.twitter.com/h03PsydvK1

— Cassidy Alexa (@cassalexa) March 11, 2014

WATCH: Harley Quinn in Arrow Season 2? See Arrow 2x16 Teaser! (TheCW on YouTube)

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Arrow Season 2, Episode 16, "Suicide Squad" airs on Mar. 19. The show could be drawing in thousands of new viewers each week. Stephen Amell now has over a million followers on Facebook. (Click on the link for laughs.)

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