A nod to Far Cry Blood Dragon can be found at one of the secret caves scattered throughout Oros in Far Cry Primal.
Entering through a hole in the wall, players will discover the skeletal remains of one of the mythical beasts featured in Blood Dragon.
The video, uploaded by Brett Makedonski of Destructoid, shows the location of the hidden easter egg. Aside from the thrill of finding this homage, discovery of the remains also grants the player with an achievement/trophy as well as a wicked guitar riff.
Far Cry Primal is currently available for Xbox One and PC. My review of the title can be found here.