Beginning with the ravaging effects of Avengers Disassembled and following the aftermath of House of M, Civil War and Secret Invasion, culminating in the evil reign of Norman Osborn, the Marvel Universe has been left with its greatest villains holding more power than ever before. On the brink of madness, Osborn targets the final obstacle in his mission: Asgard. Events are set in motion forcing the heroes to put aside deep rifts that have grown over the years. Siege will rock the foundations of every superhero, villain and team in the Marvel Universe.