It has as much a chance as the Feathered Rex, more so even since it was actually in the film prior to the Extended Edition. And it was only seen in the Biosyn Valley, yet in a Biosyn DLC, we didn't get the Moros or Iguanodon 2022 (both were in the valley and most likely made by Biosyn) but the Feathered Rex that wasn't even in the present day did.