The Arrow panel began with Ian Somerhalder (The Vampire Diaries) introduced as moderator, followed by a short Arrow season 3 video -- before Stephen Amell took the stage in full costume (specifically, the recently revealed season four costume).
"San Diego Comic-Con, you have not failed this city. My name is Oliver Queen but you knew that after 5 years away I came home with only one goal I wanted to save my city. Along the way I gained a brother, I saw people I have known my entire life become super heroes and I fell in love. But I lost people, forever. The person that I was and the persona I created he failed. But Star City not Starling City, Star City still needs saving, and all of you, you can bet your last dollar that me and my team will bust our ass trying to save or breathe our last breaths trying. All of you have come so far, and I ask you come a little bit further -- with the Green Arrow!"
- Stephen Amell as Green Arrow
This led to a longer Arrow season 3 highlight reel, before the introduction of the cast --Stephen Amell (Oliver Queen/Arrow), Katie Cassidy (Lauren Lance/Black Canary), David Ramsey (Diggle), Emily Bett Rickards (Felicity), Willa Holland (Thea), John Barrowman (Malcolm Merlyn), Paul Blackthorne (Quentin Lance); executive producers Greg Berlanti, Wendy Mericle, Marc Guggenheim and Andrew Kriesberg; plus DC Entertainment Chief Creative Officer Geoff Johns.
"We've always said the progression for Oliver is from Arrow to Green Arrow, and this is the next step"
- Greg Berlanti
Guggenheim confirmed two more DC Comics characters that will be introduced in Arrow season 4: Anarky and Mister Terrific.
"He's got to work with Felicity. Our version of Mister Terrific happens to be gay."
- Greg Berlanti
"I had tears of joy when I tried on the outfit for the first time."
- Willa Holland
A fan asked about new character dynamics in season 4. "Everyone knows everyone's business now," Amell replied, referring to the main characters' secret identities now all being known to each other. That will lead to fresh dynamics being explored -- such as Malcolm & Felicity and Laurel & Thea.