Captain America, and Henry Pym experimenting with his Giant-Man formula. Whereas Pym found success and celebrity with "Giant-Man", Banner found himself unable to crack the Super-Soldier formula. Classifying himself a failure and suffering ridicule at the hands of Pym, Banner took some of the recently rediscovered Captain America's blood, combined it with his Hulk formula, and injected it. Banner rationalized his decision by saying that turning himself into a monster gave the Ultimates a villain to fight, thereby justifying their existence at a time when they were accused of being an enormous multi-billion dollar waste of government resources. Before lapsing into unconsciousness however, Banner confessed that "honest-to-God truth of the matter" is that he simply "just missed being big." Shortly afterwards, Banner transformed into a sociopathic grey-skinned Hulk that channeled and amplified Banner's hidden emotions, unleashing the darkest depths of his id. The Hulk proceeded to track down and pursue Betty Ross, the object of Bruce Banner's affection who, because of relationship problems with Banner, was courting the favor of Hollywood film star Freddie Prinze, Jr. that night, and inadvertently boasted about it to Banner over the phone shortly before his transformation. During his rampage and cross-town pursuit of the fleeing Betty Ross, The Hulk informed Betty that he was "horny as Hell" and destroyed everything in his path, indiscriminately killing hundreds of people in the process. After rendering Giant-Man unconscious and overpowering Iron Man, Captain America, and Thor, who were all dispatched to stop his rampage, The Hulk changed back into Banner after the Wasp entered his skull through the ear canal and fired her bio-electric sting directly into his brain. Upon regaining consciousness, Banner was promptly knocked unconscious, restrained and shuttled away to S.H.I.E.L.D., the connection between him and the Ultimate Hulk covered up. Later, after being subdued by the Ultimates, an examination on Banner's blood revealed that the latest Super-Soldier Formula he took has placed a more permanent effect on Banner. The "Hulk cells" were not disappearing like they did after the first time Banner transformed, showing that the new Super-Soldier Formula Banner took would forever keep the Hulk within him. Homeland Security After his rampage, Banner spent a number of months in a cell specifically designed to withstand the Hulk's fury, with Anti-Hulk serum administered to him on a continuous basis. Amidst the Chitauri's assault on Earth and their takeover of S.H.I.E.L.D. and the United States