The backstory revealed by the new trailer is that the siblings received a "taste for witch blood" during their original adventure with the witch and the gingerbread house. Given that, the brother and sister grow up to become bounty hunters, warriors fighting against evil witches.
The story takes us some 15 years after the original story. Jeremy Renner and Gemma Arterton star as Hansel and Gretel. Famke Janssen, Peter Stormare, Derek Mears and Thomas Mann are also featured in the Tommy Wirkola-directed movie.
Of course, the movie takes some liberties with the aging process. Since Renner is 41, that would mean Hansel was 26 during the original story (ahem).
Here's how the plot is described by Wikipedia:
Catching up with Hansel (Jeremy Renner) and Gretel (Gemma Arterton) 15 years after the traumatic incident involving a gingerbread house, the siblings have evolved into vengeful bounty hunters dedicated to exterminating witches. Over the years, the siblings became expert hunters, famous for their proficiency at tracking and taking down their prey. Although still recovering from their ordeal, their work is relatively easy as for an unknown reason harmful spells and curses do not work well against them.
The Mayor of Augsburg recruits them to rid the town and nearby forests of an evil sorceress (Famke Janssen) who is planning to sacrifice many local children at the witches' gathering during the upcoming "Blood Moon" night in two days time. To make things worse, the duo also has to deal with the brutal Sheriff Berringer (Peter Stormare) who has taken power in Augsburg and conducts a very indiscriminate witch-hunt of his own.
We've seen a different trailer earlier, and even a red band trailer. A red band trailer, for those unaware, is a trailer that is approved only for "restricted" or "mature" audiences. These sorts of trailers can only be shown before R-rated, NC-17-rated, or unrated movies. They may include nudity, profanity or other material deemed inappropriate for children.
The "red band" referred to by the term indicates that an all-red graphic will be played before the trailer begins.
"Hansel & Gretel: Witch Hunters" debuts on Jan. 25 in the U.S., and on Feb. 22 in the U.K.