Detective Comics Vol. 1 (1937-2011; 2016-) #1104

Plot

Enter the scarecrow. Batman continues to reel after his defeat at the hands of the Lion, and the mysterious and deadly anti-fear virus that is coursing through Batman's veins cannot be cured. Some of the Dark Knight's most brilliant allies have tried, and failed, to find a remedy. He has run out of friends to turn to... but he hasn't run out of enemies. Will one of Batman's deadliest foes be able to save him in time?