UPDATE:
Well, I think it's fair to say that none of us saw this coming! Team Arrow are about to go to war with the League of Assassins, and joining them is a fully suited and booted Katana. The costume looks great, and is no doubt very faithful to the comic book version (try to ignore the fact that the actors who play both her and Maseo are clearly stunt doubles in the final two images though). What do you think the chances are of Katana joining the Arrow/The Flash spinoff? Regardless, with this now out there, expect The CW to drop an official image sometime in the next week. Hopefully sooner!
"This Is Your Sword" - Oliver/Al Sah-him (Stephen Amell) finishes his training and is left with two final tasks to become the next Ra’s al Ghul. Ra’s (guest star Matt Nable) threatens Nyssa (guest star Katrina Law) and delivers some shocking news. Meanwhile, Malcolm (John Barrowman) makes a surprising offer to Team Arrow and Thea (Willa Holland) goes to see Roy (Colton Haynes). Wendey Stanzler directed the episode with story by Erik Oleson and teleplay by Ben Sokolowski & Brian Ford Sullivan.