Constantine showrunners David Goyer and Daniel Cerone have revealed some of the things they would love to bring to the series should NBC renew the show for a second season.
The duo showed that if they had the chance to continue on with season 1, they would have done an arc that took place entirely in the lake house. From what was said on Twitter, if NBC picks it up for a second season, this arc will no doubt play out one way or the other.
There were also plans to introduce Doctor Fate, Spectre, Phantom Strange and The Demon. We've seen Jim Corrigan, the man who will become Spectre, in several episodes of Constantine, and we even get a slight chance to see how he might look should the writers get to explore the character further.