Imo, the Sarco and Stego running seems a little "questionable" imo. Megalania was way too small and looked like a Perentie in size since in the preview, it showed a Deinonychus chasing a Megalania which was questionable knowing that Megalania would absolutely and utterly destroy a single Deinonychus. Imagine promising that you'd give the people Pycnonemosaurus only to just give them a Carnotaurus despite the fact that they explicitly said that they'll update the game with Pycnonemosaurus.