Usually when dinosaurs appear in comic books or on screen they are there to menace the human protagonists of the story.
Age of Reptiles started off as a four-part comic miniseries in 1993 with the story "Tribal Warfare." There were no thought bubbles or pieces of dialog, only a visual story of a deadly rivalry between a pack of Deinonychus and a family of Tyrannosaurus. Delgado bent the science a bit to make a more action-packed story, but this is a comic book we're talking about, after all.
The next entry in the series was called "The Hunt" and was released as a five-part series in 1997. It was another tale of species-on-species rivalry, this time between a pack of Ceratosaurus and a young Allosaurus seeking revenge for the death of his mother. Delgado's artwork was a little more polished in this run, though it followed the previous installment of creating implausible scenarios with known dinosaurs.
Now, after a hiatus of more than a decade, Age of Reptiles is back with a new story, " The Journey." The first issue was published earlier this month, and it appears to be a story about a massive group of dinosaurs migrating south for the winter. Where will the story go? I guess we'll have to wait for the next issue ( due out in January) to find out.