X-Men/Avengers Onslaught #1

Argumento

Collects Cable (1993-2002 1st Series) #32-33, Uncanny X-Men (1963-2011 1st Series) #333-335, X-Force (1991-2002 1st Series) #55, X-Man (1995-2001) #15-17, X-Men (1991-2008 1st Series) #53-54, X-Men Unlimited (1993-2003 1st Series) #11, Onslaught: X-Men (1996), Avengers (1963-1996 1st Series) #401, and Fantastic Four (1961-1996 1st Series) #415.

Cover by Ian Churchill and Scott Hana. Back Cover by Joe Madureira and Tim Townsend.

Everything changes for the Children of the Atom and Earth's Mightiest Heroes!

Behold the psionic force of nature known as Onslaught - but what dread foe could terrify the unstoppable Juggernaut? As Cable battles Post, herald of the oncoming doom, Nate Grey faces a ghost from his past - and Onslaught gathers his forces! The Avengers join the X-Men to work out a battle plan, but could the answers lie with finding Magneto? And Charles Xavier has a troubling proposal for the Fantastic Four.

But when Onslaught's identity is revealed, who will be the traitor to the cause?