For those who don't know, Katana is a character who made her first appearance was in Brave and the Bold #200.
In February 2013, Katana received her own series written by Ann Nocenti and with art by Alex Sanchez. This book is considered by DC as part of the "Fourth Wave" of New 52 titles.
Why is this important for the series? Well Katana was created to be a member of the first Outsiders team. The team consists of metahuman superheroes who do not fit the norms of the "mainstream" superhero community. The group was created by Batman when his ties to the Justice League got tense.
The Outsiders were re-formed in the early 2000s by Nightwing and Arsenal (hint hint) after The Titans dissolved following the events of 'Graduation Day', in which the heroine Donna Troy was killed by a rogue Superman android. The intention of this new team was to act as 'hunters', actively searching for superhuman criminals currently on the loose, rather than waiting for them to act and then responding as other super-vigilante groups often do.
Does the inclusion of this character mean a possible Outsiders TV series in the future? If you haven't seen the last 3-4 episodes of Arrow, do not continue reading this paragraph. Ready? Good. Now that Roy is gone, it is possible that he could appear as part of an Outsiders group. They are certainly starting to line up some of the possible candidates for this group.
So, as always, you can see a trailer for the next episode of Arrow. This does have a bit of a spoiler feel to it, as you can actually see Katana's full costume for a split second in the trailer. If you don't mind the hype train knocking you down, you can check out the trailer below.