Two volume hardcover, slipcased set. The main volume reprints the 224-page, 4 issue miniseries, and a character key to those featured on the cover. The second volume is a 64 page compendium. It features George Pérez's original 21 pages of pencils from the never published 1980s crossover, an article about the first attempt at the crossover by K.C. Carlson, the miniseries proposal and plot development, rough scripts, a Pérez portfolio of art done to commemorate the project, annotated notes from Kurt Busiek to the characters, and other assorted background information.