Announced during Fan Expo Dallas, the six-issue miniseries will kick off in August. During the panel, Snyder described the series as a mystery story involving Nth metal (from the Hawkman universe). Batman is set to discover terrifying clues throughout the DCU and journey back to the beginning of mankind, so the series will involve characters from beyond Gotham.

Events in the previously announced Dark Days: The Forge and Dark Days: The Casting lead up to Dark Nights: Metal (see “'Dark Days' Ahead in DC's Summer Releases”).