Fox Walden has launched a unique cross-media campaign for The Seeker: The Dark Is Rising, opening in theaters on October 5. The studio has hidden signs in all of the marketing materials–such as the trailer, posters, lenticulars, banners, standees and more–for the film that unlock special content on-line at the official website when entered in the correct sequence.
That content can include exclusive clips, interviews with the actors, stills, b-roll, concept art, costume design sketches, ring-tones, etc.
For example, a user at YouTube has revealed where in the trailer the correct sequence of signs is flashed. You can also watch the full trailer here and see if you can find the signs in the official poster below!