DARK NIGHTS: METAL 101 - The History of DC’s Titular Metal Explained

DARK DAYS: THE FORGE had some deep cuts into Snyder & Capullo's "New 52" BATMAN run, and we dig them up.

via The Nerd Machine

https://www.newsarama.com/35044-dark-nights-metal-what-forge-revealed-about-snyder-capullo-s-metallic-batman-run.html