This series was one of four that was handed by Marvel editorial to Jim Lee & Rob Liefeld for relaunch with new #1s. These "reimagined" telling of each character & team was collectively known as Heroes Reborn. Along withIron Man, this second Fantastic Four series was helmed by Jim Lee.
To explain these titles' place in Marvel continuity, they were bookended by the Onslaught crossover and the Heroes Reborn: the Return event.
Following the end of the event with #13, the title was canceled and repaced with Fantastic Four (3rd series), written by Chris Claremont.