Arrow

The full low down on Katana:

http://en.wikipedia.org/wiki/Katana_(comics)

Actor Karl Yune has been cast as Maseo Yamashiro he will play Oliver Queen's Hong Kong handler in flashback scenes, and he also will evolve into a teacher and a friend who helps Oliver step ever closer to becoming the superhero he is today. In comics Yamashiro is the husband to Katana.

Actor Peter Stormare will be playing a brand new version of Count Vertigo in season three of Arrow the previous Count Vertigo played by Werner Zytle died in season 2.

And the promo art for season 3

Brandon Routh who played Clark Kent/Superman in Superman Returns will be join Season 3 of Arrow in a recurring role he will be playing Ray Palmer aka The Atom. He will play an unexpected role in Oliver and Felicity's lives as the new Queen Consolidated owner and whose intentions with the company's Applied Sciences division are a mystery.

The title for the season three premiere will be called “The Calm.”

Executive Producer Marc Guggenheim tweeted this pic