"28 Years Later," the long-in-the-works sequel to zombie horror movies "28 Days Later" and "28 Weeks Later," is coming to theaters next summer, but Sony is already building anticipation. On Tuesday, the studio released an intense trailer for the film.

Horror abounds in the first trailer for "28 Years Later," the surprise sequel to Danny Boyle's landmark 2002 zombie film "28 Days Later" that helped catapult the careers of Boyle, writer Alex Garland and star Cillian Murphy.