one of the funniest Batman/Superman moments i ever read was in the first issue of the latest run of JLA, the Justice League has gathered at it's base and are about to begin a meeting (about how to save the world as usual) when they notice Batman is not there, Superman remarks that he mustn't of arrived yet as he cant hear his heart beat anywhere in the base..........
at that point there is a chuckle from above them as Batman drops out of the shadows and while rubbing his hands together and remarks "haha, good the device works"
A later issue returns to Batmans paranoia concerning people with actual superpowers when his computer files are stolen and his secret plans for disabling the worlds most powerful heroes are actually used.