With the crisis concluded, the Hulk contacted Doctor Doom for help separating him and Banner for good in return for an unspecified favour. Doom proceeded to perform brain surgery on the Hulk, extracting the uniquely Banner elements from the Hulk's brain and cloning a new body for Banner. When Doctor Doom demands to keep Banner for his own purposes, the Hulk reneges on the deal and flees with Banner's body, leaving his alter ego in the desert where he was created to ensure that Doctor Doom cannot use Banner's intellect. When Banner goes insane due to his separation from the Hulk, irradiating an entire tropical island trying to recreate his transformation- something he cannot do as the cloned body lacks the genetic elements of Banner that allowed him to process the gamma radiation- the Hulk is forced to destroy his other side by letting him be disintegrated by a gamma bomb, prompting the Hulk to accuse Doom of tampering with Banner's mind, only for Doom to observe that what was witnessed was simply Banner without the Hulk to use as a scapegoat for his problems. Initially assuming that Banner is dead, the Hulk soon realizes that Banner was somehow "re-combined" with him when the gamma bomb disintegrated Banner's body, resulting in the Hulk finding himself waking up in various strange locations, including helping the Punisher confront a drug cartel run by a mutated dog, hunting sasquatches with Kraven the Hunter, and being forced to face Wolverine and the Thing in an old SHIELD base. Banner eventually leaves a video message for the Hulk in which he apologizes for his actions while they were separate, having come to recognize that he is a better person with the Hulk than without, the two joining forces to thwart the Doombots' attempt to use the animals on Banner's irradiated island as the basis for a new gamma army using a one-of-a-kind gamma cure Banner had created to turn all the animals back to normal. Following this, Bruce willingly joined the spy organization S.H.I.E.L.D., allowing them to use the Hulk as a weapon in exchange for providing him with the means and funding to create a lasting legacy for himself.