Legends of the Dark Knight (Legends of the Dark Knight Vol. 2 #10)

THE CONSULTANT FINALE! Batman and the Martian Manhunter have discovered that Julian Day AKA The Calendar Man is behind these crimes, all inspired by the Martian Calendar. His intention? To honor an ancient Martian Death God and absorb it's power. Batman and Martian Manhunter will need to pool together their resources to stop his final ritual from happening!