It's the world's finest annual! As the battle against Magog rages on Earth-22, Batman and Superman discover a surprising secret by way of the 5th dimension! Meanwhile, Metamorpho's story picks up after the events of the Elementary arc as our hero journeys deep within an ancient tomb that may have a hidden, deadly connection to his secret origin! Plus, Batman recruits the Challengers of the Unknown for a top-secret mission, and a special, sizzling story stars the Teen Titans' most buzzworthy member, Bumblebee! It's a world tour of the World's Finest in this first-ever series annual, curated by World's Finest architect Mark Waid!