Dark Horse Comics and DC Publishing present the ultimate superhero crossover event of 2019 in Black Hammer/Justice League: Hammer of Justice! Black Hammerco-creator Jeff Lemire and artist Michael Walsh join forces to bring the heroes of Metropolis to the Black Hammer Farm! Black Hammer/Justice League: Hammer of Justice #1 features covers by Michael Walsh, Andrea Sorrentino with colors by Dave Stewart, Yanick Paquette with colors by Dave Stewart, Yuko Shimizu, and Jeff Lemire with colors by Dave Stewart.

In Black Hammer/Justice League: Hammer of Justice, a strange man arrives simultaneously on the Black Hammer Farm and in Metropolis. Both worlds are warped as Starro attacks! Batman, Green Lantern, The Flash, Wonder Woman, Superman, and more crossover with Golden Gail, Colonel Weird, and the rest of the Black Hammer gang!

The first issue of Black Hammer/Justice League: Hammer of Justice (of five) goes on sale July 10, 2019.