Los Vengadores #90

In "null," Iron Man faces his greatest threat yet when the Mandarin unleashes the towering Ultimo robot, turning the tide against him and the forces of China. With Stark Industries shuttered by Senator Byrd over a political dispute, the hero must rely on his chest device and quick thinking to survive the robot’s relentless assault. As the battle rages, Iron Man fights to reclaim his armor and stop the machine before it’s too late.