Batman/Superman Vol 4: Siege

Superman faces his ultimate nemesis—a villain who knows all his secrets and targets everyone close to him. Batman must hunt down this murderous mastermind, but with no evidence to follow, can even the World's Greatest Detective stop Superman's Joker? Greg Pak and Ardian Syaf introduce a formidable new villain that challenges Superman's strength and Batman's intellect equally. Collects BATMAN/SUPERMAN #16-20, ANNUAL #1, and FUTURES END #1.