Early reviews suggest a dark, compelling crime drama.
Both shows are expected on New Zealand screens this year.
Also hoping to stand out is iZombie, a new take on a popular comic book about a reluctant young zombie played by Kiwi actress Rose McIver. TV executives have turned to Veronica Mars creator Rob Thomas, who admitted taking some liberties.
"We're not sticking that close to the comics," Thomas said in an interview with the website IGN last month.
"They want something in the vein of Veronica Mars or Buffy ... not a zombie apocalypse show [but] a fun, cool, smart, funny single-female lead who happens to be a zombie."
Meanwhile NBC, riding high as America's number one network after years of struggle, has commissioned a series based on comic book classic Hellblazer, which tells the story of John Constantine, a British exorcist.
Created by Alan Moore (although the Hellblazer series was written by Jamie Delano), Constantine was last glimpsed in a 2005 Keanu Reeves movie of that title in which our counter-culture hero appeared bored rather than cynically disillusioned.
"Will the new attempt prove better?"
An extended trailer suggests that director Neil Marshall and writers David S. Goyer and David Cerone have managed to capture the anarchic spirit of the original, while British actor Matt Ryan is enjoying himself as the sharp-tongued Constantine.
"Constantine looks great, and the comics are fantastic, so I have high hopes," says Charlie Jane Anders, managing editor of science and science fiction site io9.
No show will test wary viewers more than AMC's planned adaptation of Northern Irish writer Garth Ennis' cult comic book series Preacher.
Considered unfilmable and previously linked to everyone from Kevin Smith and Sam Mendes to HBO, Ennis' books tell the dark, profane and very funny tale of Jesse Custer (yes, the initials are important), a Texan preacher who has been possessed by a supernatural being named Genesis, his ex-girlfriend Tulip, an assassin, his close friend Cassidy, a hard-drinking Irish vampire, and their quest to find an absentee God.
AMC has commissioned Seth Rogen and Evan Goldberg to write a pilot, with Breaking Bad's Sam Catlin overseeing the series.
For Anders, the key to the new shows' success will depend on whether they capture the originals' anarchic spirit without alienating mainstream viewers.
- Observer