Spielberg told an audience at the convention that he has a story and a screenwriter for the next installment of his blockbuster franchise about prehistoric reptiles brought into modern times through cloning.
The filmmaker directed the first two "Jurassic Park" adventures but would be overseeing as a producer this time. He says it'll all hopefully come together in the next two or three years.
Spielberg appeared at Comic-Con for his year-end action film, "The Adventures of Tintin."
The Associated Press contributed to this story.