As many fans know, NBC cut short a full season of Constantine and also hasn't announced a season 2.
The good news is they haven't officially cancelled Constantine, and showrunner Daniel Cerone says we won't find out until May.
Now NBC has actually set up a voicemail for Constantine as anyone calling in and asking to speak to NBC chairman Robert Greenblatt regarding Constantine Season 2 will be forwarded to a voice mail.
You can then leave your thoughts about the show and suggestions.
Update: It appears the call-in campaign is not officially approved by NBC, so we took down the number and information.