CD Projekt RED teases Dark Horse collaboration

The Witcher 3 developer CD Projekt RED is cooking up a surprise with famed comic book company Dark Horse. What is it? We'll have to wait for Friday, apparently, when the developer plans to "unveil something truly special for fans of the fantasy genre" at the New York Comic Con.

The tagline for the teaser video reads "“There's a mystery near the edge of the Black Forest. We'd like to invite you to fear it with us.”

There's a Black Forest in The Witcher. Whatever could it mean?