THE CATACYLSMS THAT BIRTHED SECRET WARS! A gamma-powered Fantastic Four? A cosmic-powered Bruce Banner? Can two Earths survive their heroes let alone an incursion?! When the skies turn red and a second Earth appears overhead, brilliant scientist BRUCE BANNER discovers an impossible truth: In just eight hours, two universes will collide, and both will be destroyed. As a gamma-powered FANTASTIC FOUR battles a rampaging cosmic-powered entity born from Banner's desperate mission, REED RICHARDS faces the one problem even he can't solve. In the final hours before oblivion, will MARVEL'S FIRST FAMILY save their world...or find the courage to say goodbye?