This detail was outed by the game’s Achievements. The listing is currently called “Untitled DLC2” and it will feature six Achievements/Trophies. While most of the Achievements are being kept a secret for now, one Achievement isn’t hidden and it’s called “Murder Most Fowl.” It involves killing off 50 Pteryx’s.
Pteryx’s, often correctly referred to as Pterodactyls, are winged lizard-like creatures that existed during the dinosaur era.
Does this mean that the next DLC for Reckoning will include dinosaurs? Well, we won’t know for sure until EA/ Big Huge Games officially reveals it…but in the meantime, we can dream about it, can’t we?