THE WORLD'S FINEST TEAM-UP GOES UNDER THE SEA! A distress call from Atlantis has brought Batman and Superman deep beneath the waves...and face-to-face with the king himself: Aquaman. It's up to the World's Finest, Aquaman, and Swamp Thing to prevent an eco-catastrophe engineered by the Floronic Man! A new World's Finest team of Mark Waid and Adrian Gutierrez takes you across the DC Universe from undersea to Bizarro World in Batman/Superman: World�s Finest: 20,000 Leagues, collecting BATMAN/SUPERMAN: WORLD'S FINEST #35-37 and #40-43!