• Arrow is CW Network series developed by writer/producers Greg Berlanti, Marc Guggenheim, and Andrew Kreisberg.

Arrow is CW Network series developed by writer/producers Greg Berlanti, Marc Guggenheim, and Andrew Kreisberg. (Photo : Facebook/Arrow)

New " Arrow" season 4 updates will feature Sarah Lance's return to the show, as well as a list of characters that coud possibly die in within the show.

Warner Bros. Television revealed a new "sizzle reel" trailer for "Arrow" season 4 during the New York Comic Con event as the video introduces new characters such as Michael "Curtis" Holt/Mister Terrific (Echo Collum), Anarky (Alexander Calvert), John Constantine (Matt Ryan) and Star City Mayor candidate Jessica Danforth (Jeri Ryan).

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The video also features a fight between Malcolm Merlyn (John Barrowman) and Nyssa Al' Ghul (Katrina Law), Ray Palmer/The Atom (Brandon Routh) still alive and the long awaited return of Sarah Lance/ The Canary (Caity Lotz) to the show as she fights side-by-side with her sister. Laurel Lance/Black Canary and Thea Queen/Speedy, ScreenCrush reported.

Executive Producer Marc Guggenheim stated that it is up to Laurel's decision to bring her sister back from the dead in episode 5 with the help of John Constantine as he knows a spell that more effective and risky than the Lazarus Pit. The trailer shows Sarah her old uniform before transitioning to a white colored suit and taking the alias "White Canary" in the new spin-off show, "Legends of Tomorrow".

In other news, a list of possible characters deaths in "Arrow Season 4" have been revealed. Fans of the TV series witness Oliver Queen/Green Arrow (Stephen Amell) and Barry Allen/The Flash (Grant Gustin) attending a funeral hinting that one of the major characters of show will die at some point in season 4 at the hands of Damien Darhk (Neil McDonough).

The possible list characters that could be buried in season 4 includes John Diggle (David Ramsey), Felicity Smoak (Emily Bett Rickards), Quentin Lance (Paul Blackthorne) and Thea Queen, Moviepilot reported.

Both Diggle and Felicity have been Team Arrow for three seasons so it is safe to assume that one of these two characters will leave a huge gap in Oliver's life if they are killed as he tries to reconcile his friendship with Diggle and preparing to propose Felicity during season 4.

Quentin Lance and Thea Queen are also a strong possibility as Thea will likely exhibit the side effects of the Lazarus Pit making her more dangerous and unpredictable. Quentin Lance on the other hand, will likely die due to a moral conflict due to his alliance with Damien Darhk.

"Arrow" season 4 airs on Wednesdays at 8/7pm central on the CW Network.