At the end of the special episode that aired today, Sword Art Online: Extra Edition, it was announced that the sequel to Sword Art Online will air this upcoming year. It was then later confirmed by the official Twitter account that the sequel will be a TV anime. Sword Art Online II will animate the Phantom Bullet arc from the light novel, set in the fictitious game "Gun Gale Online."
It was also announced that the BD/DVD of Sword Art Online: Extra Edition will contain an extra episode of the Sword Art Offline specials. It will be released on April 23, 2014.
A key visual and PV for the sequel have also been posted on the official website (PV via YouTube).
Staff:
Director: Tomohiko Itou
Character Design: Shingo Adachi
Producer: A-1 Pictures
Cast:
Kirito: Yoshitsugu Matsuoka
Sinon: Miyuki Sawashiro