Arrow Season 3 Spoilers: Black Canary's Return, Ra's Al Ghul, Brandon Routh as Atom and Colton Haynes as Arsenal

Spoilers for Season 3 of Arrow continue to come out, more so now that we have reached San Diego Comic-Con. Executive producer Andrew Kreisberg spoke to IGN recently and revealed some juicy information about the third season.

Firstly, fans now know that Caity Lotz will return as Sara for part of Season 3, and "Sara" is even the title of one of the first episodes. When asked about the return, Kreisberg said, "We have her booked for three episodes, with hopefully more. She has come back to Starling City because she is on a mission...and that is all I can say."

When asked about Nyssa, the producer simply said that a lot of what happened in Season 2 set up what will happen in Season 3. As for Ra's Al Ghul, whom some fans believe is the main villain of Season 3, Kreisberg offered more or less a non-answer and said he could not confirm or deny. He did say, though, "we're never one to do the logical thing."

The show recently added Brandon Routh as Ray Palmer aka The Atom. Kreisberg offered some insight into what the actor, and the character, brings to the show:

"I think, in the great tradition of shows when they hit Season 3, we're bringing on a game-changing character, somebody who's brought on specifically to shake up all the characters, and we are overjoyed and beyond thrilled that Brandon is willing to come on. First of all, he's such an amazing guy. Beyond that, he's just such an amazing actor. One of the things we really wanted to inject more into the show was humor. What's funny about Oliver and Felicity is that he's the straight man. She sort of gets all the funny lines. What's great about having Brandon on the show is Brandon's an old-time movie star. He's like Jimmy Stewart. He can play that rat-tat-tat, Preston Sturges, you know, His Girl Friday with Felicity. He's obviously got the superhero looks and superhero physique, but he has the fun and funny and charm that Grant brings to Barry. Just from what I've seen so far in the dailies, we are so grateful that he's taken another step back into the DC Universe."

That all sounds great, but will Routh step into The Atom's costume? "Well, you don't bring Brandon Routh onto your show to not go down that path," Kriesberg said. "As always with these things, how, when, where and why will be the journey of the season."

Finally, Entertainment Weekly has posted a new photo of Colton Haynes as Arsenal, which you can see at the top of the page.

What do you think of Kreisberg's Season 3 preview? What do you think of Arsenal's costume? Let us know in the comments below.