Like the CW's
Arrow and
The Flash, NBC's
Constantine is expected to draw from its source material and bring in some characters from the darker corners of the DC Comics universe -- but who specifically could be joining 'ol JC (Matt Ryan) on the show? Well it's already been confirmed that future Spectre Jim Corrigan in on board, and Dr. Fate's helmet popped up in the pilot, but it sounds as if we might see several other fan favourite characters such as Zatanna, Deadman, Black Orchid and other members of "Justice league Dark" too.
When quizzed about this by Screen Rant, writer and showrunner David Goyer replied:
"Yeah. I think you’ll see some of those…If the show takes off." Goyer says there's already plans to bring in "two or three characters from the broader DC universe" in the first 12 episodes, but if the show gets a second season there should definitely be many more. But what about a certain "big green fella" who's had many dealings with the foul mouthed occultist over the years? Goyer reveals that Swamp Thing's name has been brought up, and it sounds like it's a definite possibility..as long as they're confident that they can pull off the special effects.
"It’s been thrown around. It’s not something I think we’d attempt in the first season. We need to make sure that we can pull off the special makeup effects. We don’t want to do a cheesy version of Swamp Thing. It’s a lot easier to do Dr. Occult or Zatanna or Jim Corrigan than it is to do Swamp Thing. So we’ll see.” So what about some crossover with the other DC TV shows? Goyer says there are currently no plans, but anything is possible. There's much more at the link below.