Blue Beetle and Katana in ARROW Season 3?

At this rate, we're going to see most of the DC Universe on television by 2016.

TVLine has new details on four new characters for the third season of the CW series Arrow, with two of them factoring into Oliver Queen's flashback sequences.  Now, the names provided are most likely false to prevent spoilers, but here's the list from TVLine...

"DANIEL" -- Though Daniel could be a fake name to throw off spoilerholics, this 20something gent — a major recurring character for Season 3 — is a handsome, enigmatic and highly intelligent entrepreneur developing groundbreaking technology. (Picture a business magnate in Ryan Gosling’s body.) Though exuding charm and confidence in public, he privately harbors a tragic past that will drive him to become a tech-powered superhero. Watch for this formidable fella to be a love interest for Felicity and a rival of Oliver’s – both personally and professionally.

"SETH" -- A well-educated criminal with grand ambitions and a knack for chemistry, this potentially recurring character gains power over his enemies by exposing them to a drug that drains their willpower. Oh, and he is very much a physical match for The Arrow.

"TOSHI" -- Majorly recurring in (at least) the Hong Kong flashbacks, Toshi will serve as Oliver’s teacher and handler, and eventually become a friend. A well-trained operative, skilled in weaponry, combat and intelligence gathering, he is also a devoted father and husband.

"AKIKO" --Toshi’s wife is another of Oliver’s Hong Kong caretakers, and is herself highly skilled in martial arts.

"Daniel" seems likely to be none other than Ted Kord, better known as the Blue Beetle.  Ted has been previously mentioned in a flashback by Moira Queen where she remarks how quiet Robert Queen is after attending a Ted Kord fundraiser.  His company, Kord Industries, also made an appearance when a mechanical product is stolen by Cyrus Gold for Brother Blood out of Queen Consolidated's applied sciences division.  The product was going to help mass-produce a serum that will give people super strength.  After a brief fight with Gold, the Arrow managed to destroy it and stop the villain.  His company is again seen as henchmen of the Clock King break in and steal a device that will allow the Clock King to break into any bank vault anywhere.  In addition, Ted Kord was recently reintroduced to DC Comics readers at the end of the Geoff Johns event series Forever Evil.

As for "Toshi" and "Akiko," I believe that "Akiko" is actually Tatsu Yamashiro, also known as Katana.  Tatsu is skilled in martial arts and is married to Maseo Yamashiro ("Toshi," presumably) until Maseo is killed by his brother Takeo with a sword, a katana called Soultaker, as their children are killed.  Tatsu takes possession of Soultaker and learns that her husband's spirit now resides inside her sword, allowing her to hear his voice.  After losing her short-lived ongoing comic book series, Katana recently appeared in the pages of -- you guessed it -- Green Arrow during the storyline "The Outsiders War."

"Seth," however, seems a bit more difficult to figure out.  While he could be simply as described, it's more than likely that he's a DC Comics character, but which one?  The only one that springs to mind is Jonathan Crane, the Scarecrow, but I imagine he's probably off limits for a future episode of Gotham.

Arrow returns in the fall on The CW, probably around October.