Written by Jeff Lemire. Art and Cover by Michael Walsh. DC Comics and Dark Horse Comics present the ultimate superhero crossover event of 2019! Dropped into the DC universe, the Black Hammer heroes find themselves captured by members of the Justice League who blame them for the cosmic switch-and on the Black Hammer Farm, the displaced DC heroes search for answers and a way out of their bucolic prison. But Colonel Weird and the Green Lantern discover that the solution to this riddle may not be so simple.