Nightwing: One Million #1000000

THE ANACHRONISM Nightwing meets the Batman of the 853rd Century. Batman fights Nightwing because out of "custom" as he had studied on how masked lawmen of this era meet and challenge one another to test their skills, much to Nightwing's chagrin. Fortunately, the Datarangs that Batman uses against Nightwing are harmless and has them place a mark on his genetic code to allow Batman from losing track of Nightwing.  The two heroes travel through the ruins of post-Cataclysm Gotham while they learned from one another. The duo then stop Slyfox and Riddler's henchmen Query and Echo (who are posing as construction workers) in the middle of a robbery. After dealing with the criminals, Nightwing and Batman discuss about the Hourman Virus in which the latter has the means to finding a cure, but he lacks the necessary equipment. Nightwing knows where he can find them and leads Batman to the Batcave.