Rejoice, the DCEU is officially big enough to include Earth's widest human Dwayne Johnson, who made a gigantic splash during DC's Fandome by formally introducing Black Adam. Directed by Jaume Collet-Serra (The Shallows), the film will mark the live-action movie debut of Teth-Adam, the longtime magic-infused adversary of Shazam. The Fandome panel—which also included Noah Centineo, who co-stars as Atom Smasher—came complete with a ton of concept art images, which not only give you a feel for how Johnson will look in costume but also the character's background as a …