The big news at San Diego Comic Con today? You can’t get much bigger than the Justice League meeting the Monsterverse in the mash-up to end all mash-ups.

That never-before-seen face-off is the premise behind Justice League vs. Godzilla vs. Kong, a new crossover comic from DC and Legendary Entertainment.

The series was revealed at San Diego Comic-Con. Produced in partnership with Toho International, Justice League vs. Godzilla vs. Kong is a seven-issue crossover that sees the barriers between worlds break down and the creatures of the Monsterverse (not just the big two) cross over into the DC Universe.

DC and Legendary have called the comic storyline “the cataclysmic crossover event of the year you never expected.” The seven-issue series, produced in partnership with Toho International, is launching in October of this year, and will be written by Brian Buccellato, who along with Christian Duce is one half of the creative team for the series.

“I’ve had the good fortune to write most of the legendary DC Super Heroes before—from my time on The Flash, Detective Comics, and Injustice. This time I get to build something way larger-than-life using all the toys in two different sandboxes. It’s such a thrill to tear open both the DC Universe and Legendary’s Monsterverse for this dream project,” Buccellato said in a statement about the series.

He added that Duce and color artist Luis Guerrero are “perfect partners in this oversize endeavor. Christian has been masterful in his navigating the story’s enormous scope in terms of character moments, rampaging monsters, and big superhero action. And Luis’s stunning palette and rendering are an amazing complement to Christian’s art.”

So how do the Justice League get in the same arena as the killer Kaiju?

According to DC, the series begins, as these stories often do, with a battle between the Justice League and Legion of Doom. That battle opens a doorway to the Monsterverse, causing Godzilla, Kong and other monsters to spill over into the DC Universe, with all the inherent mayhem that will bring about. Will the combined might of Batman, Superman, Wonder Woman and the rest of the super-friends be enough to stop Godzilla, Kong and company?

“As a comics fan—there’s nothing more fun and exciting than exploring those amazing ‘What If’ situations that come up when fandoms cross streams!” said DC President, Publisher and Chief Creative Officer Jim Lee in a statement. “In this case, it’s a matchup of the world’s greatest Super Heroes in the Justice League who take on not only the King of the Monsters—Godzilla—but the mighty Kong himself! It’s a crossover no-holds-barred battle, decades in the making, and no bona fide comics fan will want to miss it!”