In a possible future, Bruce Wayne has used a machine to download his memories and training into a series of clones of himself, each one aged to a point where they can act as Batman for around twenty-five years before they need to activate the new clone. By the time that the tenth generation clone is created, the Batcave has become a vast workshop, including a flying Batmobile, a robotic shark as a trophy, and costumes in glass cases, but the older Batman informs the new one that the contents of the cave will be burned upon his death so that the new Batman can make room for his own things while using the recorded memories to keep track of anything important from the past.Detective Comics (vol. 2) #27
