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BATTLE OF THE SUPER SONS! As war brews in El Caldero, something strange is happening to the Kryptonite spread across the planet...and this mystery can only be solved with help from a certain Dark Detective. But can Batman crack the case before Jon Kent and Damian Wayne turn the Batcave into a war zone?! The pieces fall into place for a new Kingdom to rise and a devastating new threat to unite the reign of the Superboys!