This week on THE SOURCE, we’re giving you a double dose of exclusive previews courtesy of the Justice League and Justice League of America!

After the shocking events of “Throne of Atlantis,” the World’s Greatest Superheroes have decided to expand their ranks. This month, Cyborg uses the Grid to summon up and coming heroes from throughout the DC Universe to the Watchtower for a once in a lifetime opportunity! Who will answer the call? And more importantly, who will be inducted as a full-time member of the League? Plus, don’t miss another thrilling chapter of Shazam! Written by Geoff Johns and illustrated by Jesus Saiz and Gary Frank, JUSTICE LEAGUE #18 hits stores tomorrow.

Meanwhile, in JUSTICE LEAGUE OF AMERICA’S VIBE, Cisco begins his new job as Detroit’s urban hero and a member of the Justice League. But when things don’t go as planned, he begins to have doubts about being a hero in the first place. Will Cisco be able to find the hero within in time for the JLA’s first press conference? Find out in JUSTICE LEAGUE OF AMERICA’S VIBE #2, in stores tomorrow, written by Geoff Johns and Andrew Kreisberg, and illustrated by Pete Woods, Andres Guinaldo, Sean Parsons and Bit.