What about 'Knightfall'? I wouldn't have said that one fizzled out - it gave us a hell of a lot of Bat-action, introduced the characters of Bane and Azrael, gave Batman one of the more memorable (and painful) defeats of his career, had Bruce briefly replaced as Bats, and wrapped up with a grudge match between Batmen that, for a rarity, ended up with both involved shaking hands and wishing each other well. I would have said that it was an extremely satisfying Batman-event.