A new international (New Zealand) promo has surfaced for next Wednesday's episode of Arrow, which is titled "Al Sah-him."
The final portion of the sneak preview appears to contain a major spoiler: Thea Dearden Queen (Willa Holland) is finally joining Team Arrow. Looks like Thea is finally going to become Oliver's Speedy sidekick. Although, her timing is terrible. Oliver is being trained/brainwashed by The League of Assassins. On other hand Roy/Arsenal, Oliver's previous sidekick, had to get out of dodge so there is a sidekick-vacancy.
In the comics, the Green Arrow's sidekick is Speedy, which is Thea's nickname on the show. She also has the middle name Dearden, which is a reference to DC Comics' Mia Dearden who was also Oliver Queen's sidekick.
Check out the new Arrow promo in the video below.
THE LEAGUE OF ASSASSINS SETS THEIR SIGHTS ON NYSSA — Oliver (Stephen Amell) goes through a rigorous transformation. The League of Assassins sets their sights on Nyssa (guest star Katrina Law), who is back in Starling City training Laurel (Katie Cassidy). When Nyssa realizes they are coming, she arms up to face them alone but Laurel asks Felicity (Emily Bett Rickards) and Diggle (David Ramsey) to help protect her new friend. Thor Freudenthal directed the episode with story by Beth Schwartz and teleplay by Brian Ford Sullivan & Emilio Ortega Aldrich (#321). Original airdate 4/29/2015.