Marvel has given more details of their Free Comic Book Day offering to USA Today, and the event it will inspire, Infinity.

They confirm Infinity as a six issue series starting in August by Jonathan Hickman, Jim Cheung, Jerome Opena and Dustin Weaver. And Hickman pitches it as "The universe's greatest serial killer is cut loose to do bad things to our most precious world."

And we're to look for clues in his Avengers titles. Infinity Gauntlet, Multiverse, and those alien life generators, perhaps?

In the flagship Avengers, the "space opera" tale of Infinity teams the likes of Iron Man, Captain America and Thor with outer-space heroes Nova and the Guardians of the Galaxy on a mission to bring together shape-shifting Skrulls, warriors of the Kree, the Alien-like Brood and other intergalactic folks against a common foe. And the Avengers will need all the help they can muster. Their new enemy, the Builders, are an ancient race of universe-building beings targeting Earth for destruction, who "can raze worlds and have basically seeded life through the galaxy," Hickman says. Issues of New Avengers as well as Infinity focus on Thanos' secret agenda and the superheroes who are left to deal with him and his army running roughshod over Earth.

Also making a major appearance are the Inhumans. We hope to have more on that, for Bleeding Cool, later today.

UPDATE: Here's how Marvel describe the comic:

Earth has been marked as an "Avengers World", protected by Iron Man, Captain America, Thor and more from the deadliest threats facing humanity. A powerful and destructive race is on a collision course with Earth and the only thing in their path is the Avengers! But even Earth's Mightiest Heroes realize the one hope of defeating this dire threat is to unite every great hero across the cosmos…because only with a united Avengers Universe is there any chance of survival! With our heroes at the other end of the universe, who is left to protect Earth? Enter Thanos, the galaxy's most ruthless threat and an unparalleled force of brutality who brings order to the chaos of life through murder. The greatest threat to the Mad Titan's work—and perhaps the universe's greatest hope—is something he created leaving no world safe. Earth's last hope may lie in the hands of a man who can level cities with a single whisper – Black Bolt, king of the Inhumans. But can the fearsome leader of a race hated and feared by his world, lead his people against Thanos? If they fall, so does the Earth—and the entire universe with it.