UNITED THEY FALL ON THE ROAD TO ARMAGEDDON! A shocking betrayal leaves Captain America's S.H.I.E.L.D. team at odds - just in time for Doom's ultimate weapon to be dragged into the light. But it's not what anyone thought it was, and as an all-out feeding frenzy ignites between Salvation, Red Hulk and S.H.I.E.L.D., it's up to Steve to get his hands on the weapon before it's too late!