John Eisenhart was a studio executive for Lotusland Productions, researching the Knights of Banner, migrant
worshippers of the Hulk. The Knights of Banner had been experimenting with gamma rays, hoping to create a new Hulk. After the Knights refused to sell their story to him, Eisenhart reported them to the police. As the police arrived, a battle ensued leading to the capturing and slaughter of many knights. Eisenhart, wracked with guilt, joined the Knights in their fight. A young knight the studio exec had befriended named Gawain tried to end the violence by killing everyone by setting off the gamma devices, only to have his new ally caught in the blast. The blast transformed Eisenhart into a new Hulk, who quickly ended the battle. Upon returning to Lotusland, the studio executive was assigned to investigate a new desert creature (himself). Lotusland as a company continued to have much trouble, including nearly everyone going quite mad due to outside influences.
During his investigation, Eisenhart/Hulk would meet a singer/songwriter named Quirk. She would join Eisenhart/Hulk in his search for Gawain, who had been captured during the initial battle. The search would take them to multiple locations, including a mall that is dozens of miles long and has many abandoned areas. The Hulk would deal with multiple foes in multiple spots while his human side, which he is liking less and less, has to deal with the backstabbing at his workplace. This plot would last for the duration of the Hulk's 2099 Unlimited appearances, with the young knight being rescued.
Gawain's salvation would be short-lived, as he would die at the hands of the villain Draco at the start of the Hulk 2099 series, fueling Eisenhart/Hulk with guilt and remorse throughout the rest of the series over his broken vow to protect the young knight. In addition to Draco, the Hulk would face other villains throughout the series (Golden One, Cybershaman, Dr. Apollo, Anti-Hulk). He then went searching for his ex-wife, but instead ran into his demise. The Hulk would meet his demise at the barrels of guns of the post-Doom S.H.I.E.L.D., dying after being shot by an unspecified energy in 2099 A.D. Apocalypse.
Or rather "apparently dying" because as Bruce Banner may well attest with their own words "Do not 'kill' a Hulk with ease so pathetic!" . What happened was that the Hulk in 2099 amount due to catastrophic events which took part involving gamma radiation fell into a coma and was taken by S.H.I.E.L.D. and held prisoner unconscious in a state of suspension. But recently he was released from captivity and awakened by the Red Hulk 2099 which followed the orders of Neo-Illuminati .Live again and at the height of power Hulk 2099 faced Juggernaut 2099 and won. Today John Eisenhart is a soul in search of redemption for all the misfortunes that caused involuntarily and serves on S.M.A.S.H.2 alongside Hulks of future.
Powers and abilities
The Hulk 2099, like his namesake, was one of the strongest characters in his fictional universe; and also like the original, the strength of the character would increase with his emotional state. His baseline strength is 150 tons and he is nearly invulnerable. In addition, Hulk 2099 had a high level of speed and stamina, a healing factor, and could leap great heights (he could easily leap hundreds of feet in height and hundreds of miles while in an enraged state). Eisenhart can willingly transform himself into Hulk 2099, the process adds 5' 9" inches in height and 1,423 lbs to his frame. Unlike his predecessor, this Hulk had razor sharp claws and fangs that could tear through steel.
The most distinctive contrast of Hulk 2099 to his Earth-616 counterpart was his psyche. Initially, when turned into the Hulk, Eisenhart retained his intellect and personality (although significantly more aggressive, due possibly to his current emotional state). Eisenhart was even able to control his transformations. However, as the series progressed, Eisenhart and the Hulk became two distinct and separate personalities, Eisenhart more ruthless, while the Hulk heroic. As the mental separation became more distant, transformation would only occur during moments of rage.
After being released from captivity, S.H.I.E.L.D. Red Hulk 2099 the two personalities (John Eisenhart and Hulk 2099) reached a mutual consensus that the Hulk 2099 should be a formidable force for good and merged resulting in a third personality that adds the best of both and that in control Hulk 2099.