We don't know much more about the story but at D23 Expo, Pixar revealed a piece of concept art which featured a silhouetted brachiosaurus with a small kid on his head, standing in front of a sunset. (slashfilm.com)
With that in mind, I thought it would be interesting to hear what the paleontology community had to say about the animal kingdom of Horizon Zero Dawn, especially since Guerrilla has taken such clear inspiration from the likes of brachiosaurus, velociraptors, saber - toothed tigers, and many more beasties from the prehistoric era. (waypoint.vice.com)
For example, the museum level features a gigantic brachiosaurus skeleton. (gamingpodcast.net)