Did the teaser trailer offer any clues about the antagonists or primary threats the characters would face in the film?

The teaser trailer subtly hinted at potential antagonists and threats beyond the walkers. There were fleeting visuals suggesting the existence of other human groups, some seemingly hostile and territorial. A mysterious, almost supernatural phenomenon affecting the walkers was also implied, suggesting a deeper, more complex threat than simply hordes of undead. However, the trailer deliberately avoided revealing specific antagonists to maintain suspense.