Will the Spectre be showing up in Constantine, the DC Comics Vertigo title on NBC? Things kind of point that direction as the show as added the character Jim Corrigan, to the show to be played by Emmett Scanlan, who is known to be Spectre in the DC Universe. This could be another fun series like Arrow if they introduce several of DC’s supernatural characters to the show.
What would really be cool is if they would tie this into Arrow and Flash for crossovers. But that’s probably to much to ask for.