John Barrowman spoke about his character's return in season 4 of Arrow at the Las Vegas Comic Con.

The actor confirmed that Malcolm Merlyn, who was conferred the title of Ra's al Ghul in the finale of season 3, will be coming back for the next chapter. ComicBook reported from the event and got Merlyn's quote on what lies ahead.

"We start filming in July, Season Four -- I just finalized my deal about a week ago," Barrowman said. "I'm very excited about going back, I can't tell you anything because I do know a bit about what's going to happen. But if you love Malcolm Merlyn, if you love Oliver Queen, if you love Thea Queen, if you love the Canary sisters, and I say that with a bit of a twist and a joke in it, you're going to love what's going to happen across the DC world."

Oliver And Felicity's Relationship To Be Challenged In Season 4?

Previously, ComicBook had also strongly suggested that the first footage from season 4 of Arrow will be unveiled at San Diego Comic-Con in July. But if filming begins that month it seems highly unlikely that they would have anything to unveil for fans.

The official press release stated the details of which DC shows will be presented:

"8 - 11 p.m. - Warner Bros. Television & DC Entertainment Present: Super Hero Saturday Night Offers Fans a Look Inside the Worlds of Arrow, The Flash and Gotham, plus a Pilot Screening of Supergirl and Video Presentations of DC's Legends of Tomorrow and Vixen: DC fans ... get ready for another Super Hero Saturday Night! Warner Bros. Television and DC Entertainment will again welcome fans into the worlds of some of DC Comics' greatest characters during a three-hour super-experience in Hall H."

The writing for the next chapter has also begun. The creative team put up images on June 1 and 2 of the schedule for the development of episodes. The first said some form of farewell to the white board which featured the schedule for season 3, with each episode's "prep date," "shoot date," and "status/last completed cut." In the next image, the table was being drawn out for season 4.

The announcement of Arrow's renewal for a fourth season was made earlier this month.

The finale of season 3, entitled 'My Name is Oliver Queen,' of Arrow aired on May 13 on The CW.

Watch the promo teaser for season 4:

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Arrow, The cw, Television