In its later years, Smallville featured a number of familiar faces from the DC Universe.

Could Arrow do the same?

According to producer Marc Guggenheim says it’s possible we could see some DC cameos in the future.

“You’ll still hear about characters from those worlds and from those cities. We’re imagining a DC universe without super-powered characters but that doesn’t mean that in our parallel universe that there isn’t a Metropolis or a Gotham City. There are references to places like Corto Maltese (a wartorn island) and Markovia. I would listen and watch carefully if you’re a comic book fan because some of the references are really subtle and will go past a lot of people,” he says. “We’ve got a lot of different characters and then there are characters you may not recognize unless you’re a diehard comic book fan. One of the things we’ve done, mainly because we’re fans, is we’ve thrown in a lot of Easter eggs for the hardcore fans. If you’re a big fan of the DC Comics universe, you’ll see a lot of familiar names and places: Big Belly Burger, which is a hamburger chain from the Superman comic books makes a regular appearance on our show and we have a Big Belly Burger franchise as one of our standing sets.”

However, that doesn’t mean we’ll see the big three from DC on Arrow.

“We’re open to anything and everything; I’m not entirely sure you’ll be seeing characters like Superman, Batman, Green Lantern and Wonder Woman because they’re much more fantastical and right now we’re focusing on Oliver Queen as being the only hero. That being said, we’re looking forward to bringing on other DC Comics characters and characters that people have never really seen before or lesser-known characters. That’s what’s been fun for us; Superman will always get his due,” he adds.