Army of the Dead's battle scenes reveal that some of the zombies in Las Vegas are actually robot zombies - but who created them, and why? With Netflix planning to expand Zack Snyder's universe of the undead into prequels and spinoffs, the explanation for the robot zombies is being saved for one of these upcoming projects.

The robot zombies in Army of the Dead are distinguishable from the real zombies by their eyes, which sometimes glow blue. Two of the robot zombies can be seen in the…