"Night of the Bat"
The Swamp Thing tracks the activities of the Conclave and it's mysterious leader, Mister "E", to Gotham. We find that Gotham businessman Nathan Ellery, philanthropist and associate of Bruce Wayne is the director of the Conclave, and holds Abigail Arcane and Matt Cable captive, hoping to torture the secret of the bio-regeneration formula from them. Swamp Thing's activities have been reported in the city, so Batman is on a dual mission to track the Conclave and tackle the misunderstood monster.