There's a lot in store on this season of Arrow and a new sizzle reel from New York Comic Con just released by Warner Bros. shows a few things that viewers of the show can look forward to.

First, the video offers a very brief look at John Constantine (Matt Ryan) on the series, who will help Team Arrow deal with bringing Sara Lance (Caity Lotz) back from the dead. Sara's been dead for some time, so the Lazarus Pit is probably no longer an option, so Constantine will help resurrect her and set her on the path to becoming White Canary in The CW's upcoming Legends of Tomorrow series.

However, there's a lot more stuff in this video, too, including some scenes with Thea (Willa Holland), who returned from the dead via the Lazarus Pit last season. And although we haven't seen it yet, this clips shows that she'll start experiencing some side effects from the Pit.

The clip also offers a sneak peek at Jeri Ryan on the series: Ryan portrays an old family friend of the Queens who decides to run for mayor. Of course, Oliver (Stephen Amell) isn't too happy about that, considering that the last three mayors of Star City ended up dead.

There's also the mystery of Ray Palmer (Brandon Routh), presumed dead. However, this clip contains a hint that something else is going on there (and as most viewers know, he'll turn up on Legends of Tomorrow as The Atom).

Finally, this video shows how Sara comes back from the dead to become White Canary for Legends of Tomorrow. Considering she's been dead for a while, this should create some major drama for Team Arrow, as well as Sara's other family and friends.

In last season's finale, Oliver hung up his Arrow costume for good. However, in the first episode of season four, Oliver and Felicity returned to Star City to help their friends battle the new evil that is Damien Darhk (Neal McDonough) and his HIVE lackeys. Oliver is now the Green Arrow, complete with a new costume and attitude.

The first episode of season four also showed Thea in action as Speedy for the first time, as well as showed off the new John Diggle (David Ramsay) costume, which makes him look a little like Magneto.

Arrow airs on The CW on Wednesdays.

For more Comic Con news, check out T-Lounge coverage of New York Comic Con 2015.

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