Superman & Batman vs Aliens & Predator #1

Deep within the Andes Mountains, a once-dormant volcano has awakened with a destructive force. This awakening brings with it the discovery of a hidden colony of Predators and Aliens, who have lived in isolation until now. As Batman and Superman grapple with the dilemma of how to protect Earth from these creatures without extinguishing their right to survive, they face a threat unlike any other mankind has ever encountered.