In the "Arrow" press room at Comic-Con 2017, Executive Producer Marc Guggenheim explains more about "family" being the theme of Season 6. Then, Marc reveals more about how flashbacks will work this season. And, Marc talks the Vigilante mystery and having Katie Cassidy back as Black Siren. » SUBSCRIBE: bit.ly/AHSub » Visit Our Website: www.AccessHollywood.com/ Get More Access Hollywood: Facebook: www.facebook.com/AccessHollywood Twitter: twitter.com/accesshollywood Instagram: instagram.com/accesshollywood Snapchat: OfficialAccess About Access Hollywood: "Access Hollywood" is a nationally syndicated daily entertainment news show. "Access Hollywood" delivers the most comprehensive coverage of entertainment news and personalities on television, featuring in-depth celebrity interviews and behind-the-scenes accounts of the most important events in Hollywood. 'Arrow's' Marc Guggenheim On S6's Family Theme, The Vigilante Mystery & More | Access Hollywood youtu.be/0OJKgV8dy9I Access Hollywood www.youtube.com/user/AccessHollywood