So what do you think happened to Zoro here?
Did Oda simply make a mistake, or was it deliberate to show us that Zoro stood up to fall back down again?
Did he stand up to fight the reaper, or bargain with him? Do you think he died here but made some kind of deal with Enma (hence king of hell), to let him live until Luffy's journey is over, and he'll die at the end of the series?