Heroes should die really crappy deaths sometimes. Top Ten Crappy Deaths For Batman 9. Slips on soap in shower. Bleeds to death from skull trauma. Alfred tidies up, takes on Batman mantle himself.
Nobody ever knows.
Crashes Batmobile while chasing purse-snatcher who is on foot. The one time he didn't buckle up. Lesson for the kiddies. While drinking apple juice disguised as champagne, contracts e.coli infection. Odwalla sues DC, ties up courts for years.