In a recent interview, Arrow showrunner Marc Guggenheim spoke about what fans can expect from the rest of season 3 and dished about the future of Ra's al Ghul (Matt Nable).

Slade To Be "Out For Blood" In Upcoming Episode Of Arrow 

Speaking to TVLine, Guggenheim revealed that Ra's al Ghul was still very much a part of the plot and will be returning for the rest of the chapter. When asked about whether Ghul was only brought in to finish off Oliver Queen (Stephen Amell) and if that was the last fans will see of Ghul, Guggenheim suggested that Ghul still had unfinished business on the show.

"Or was he brought on to do more than fell Oliver?" he teased. "Exec producer Greg Berlanti promises that the League of Assassins overlord is "very vital in the back half of the season," adding: "You're probably starting to see our tricks by now, where the midseason cliffhanger is very much declarative of the back half of the year."

Mid-Season Premiere To Be One Of The "Most Emotional" And "Action Packed" Episodes 

 Here's the official synopsis for the mid-season premiere, Left Behind:

"THE TEAM DEALS WITH OLIVER'S DISAPPEARANCE - In the aftermath of Oliver's (Stephen Amell) fight with Ra's al Ghul (Matt Nable), Diggle (David Ramsey) and Arsenal (Colton Haynes) continue to protect the city in the Arrow's absence. However, after three days without hearing from Oliver, they begin to fear the worst may have happened to their friend. Felicity (Emily Bett Rickards) refuses to believe that Oliver could be dead until Merlyn (John Barrowman) pays the team a surprise visit. Thea (Willa Holland) suspects there is something more behind Oliver's disappearance and asks Merlyn for a favor. Meanwhile, Ray (Brandon Routh) tests a part of his new suit and Laurel (Katie Cassidy) takes up the mantle of the Black Canary. Glen Winter directed the episode written by Marc Guggenheim & Erik Oleson (#310)."

The episode is set to release on January 21, 2015 at 8 p.m. E.T. on the CW.

Watch the promo for the episode here:

Tags: Arrow the cw television