The ubiquitous nature of DC live-action TV series these days has raised plenty of questions about shared universe and possible 'Justice League' crossovers, and now one of our first major DC drop-ins has emerged from an unlikely source. See what DC superhero will pop up in a new trailer for NBC's forthcoming 'Constantine' series!

You're warned of potential spoilers for the new DC drama from here on out, but where previously we'd look to 'Arrow' or 'Gotham' to incorporate major DC characters, it seems 'Constantine' will sow a few seeds early on. From io9, a new international trailer for DC's David Goyer-produced 'Constantine' contains a quick shot of one character holding up the unmistakable helmet of Doctor Fate, one of the comic universe's best-known sorcerers.

The character had previously been brought to live-action through the CW's 'Smallville,' and it remains to be seen if Doctor Fate will have any kind of major role in NBC's 'Constantine,' though the appearance at least constitutes a surprising sign that the new live-action 'Hellblazer' won't ignore its comic origins. Meanwhile, here’s how NBC describes the series officially:

Based on the wildly popular comic book series “Hellblazer” from DC Comics, seasoned demon hunter and master of the occult John Constantine (Matt Ryan, “Criminal Minds”) specializes in giving hell… hell. Armed with a ferocious knowledge of the dark arts and his wickedly naughty wit, he fights the good fight — or at least he did. With his soul already damned to hell, he’s decided to leave his do-gooder life behind, but when demons target Liv (Lucy Griffiths, “True Blood”), the daughter of one of Constantine’s oldest friends, he’s reluctantly thrust back into the fray – and he’ll do whatever it takes to save her.

Before long, it’s revealed that Liv’s “second sight” — an ability to see the worlds behind our world and predict supernatural occurrences — is a threat to a mysterious new evil that’s rising in the shadows. Now it’s not just Liv who needs protection; the angels are starting to get worried too. So, together, Constantine and Liv must use her power and his skills to travel the country, find the demons that threaten our world and send them back where they belong. After that, who knows… maybe there’s hope for him and his soul after all.

The cast also includes Harold Perrineau and Charles Halford. Writer Daniel Cerone (“The Mentalist,” “Dexter”) serves as executive producer with David S. Goyer (“Man of Steel,” “The Dark Knight Rises”). “Constantine” is produced from Bonanza Productions in association with Warner Bros. Television. The show is based upon characters published by DC Entertainment.

You can also check out the first photos and clips from NBC's 'Constantine' adaptation, due to premiere on October Fridays this fall, but what do you think? Is the Doctor Fate appearance a sign of a broader DC mythology than we thought for the series? Might DC one day drop the bomb that all its live-action series are intended to connect to their big-screen counterparts? See for yourself below (the helmet can be found at the 00:47 mark), and give us your thoughts in the comments!