While DC Comics properties have always been big hits at the box office, the comic book company is in the middle of a TV resurgence, with Arrow and the potential spin-off The Flash at The CW, and Fox's upcoming Gotham. We reported last week that NBC is getting into business with DC, ordering a pilot for Constantine.

During the TCA Winter Tour, NBC chairman Robert Greenblatt commented on the tone of this potential series, which was written by David S. Goyer (Man of Steel) and Daniel Cerone (The Mentalist).

"I don't know the DC comic very well, but there is dark, interesting stuff in it, but it's also got some witty banter. It's a fun tone, although the supernatural stuff is scary."

The character, who was previously brought to life on the big screen by Keanu Reeves in 2005's Constantine, was created by Alan Moore, Steve Bissette and Jamie Delano in 1985, first appearing in an issue of The Saga Of The Swamp Thing before getting his own comic book series, Hellblazer in 1988. In the comics, John Constantine was a con man who became a supernatural detective and a reluctant protector from demonic entities. The Hellblazer comics ran for over 300 issues, before it was rebooted under DC's "New 52" initiative that featured a younger version of the character. It has been rumored that this pilot will follow the "New 52" story line, although that has not been confirmed.

While crossover episodes are rare in today's television landscape, it's even more rare to see a crossover between two shows on different networks. When asked if Constantine might cross over with Arrow or Gotham, Robert Greenblatt had this to say.

"Cross-network is really hard. It's hard enough to do it within your network. I think let us see how the pilot goes before we answer that question!"