Arrival of Galactus is the first event in the Astonishing Universe serving as the first culmination of the Astonishing Universe. Arrival of Galactus also serves as the last story in Arc I. The story continues after Cable and Silver Surfer warned the X-Men and Fantastic Four of Galactus' impending arrival told in Astonishing X-Men and Astonishing Fantastic Four. The X-Men and Fantastic Four notify S.H.I.E.L.D. of this, seeing the sources are more than trustworthy with one being from the future and another being from space Nick Fury alerts the Avengers of this.