LYCOS RETRIEVER 
Hulk: Merged Hulk
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Marvel hired John Byrne for a second volume of the series, retitled "Hulk", with Ron Garney penciling. Byrne wrote of his plans for the first year,[citationneeded] but creative differences led to his departure before the first year was over. Erik Larsen briefly filled scripting duties in his place, and the title of the book soon was returned to The Incredible Hulk with the arrival of Paul Jenkins. Jenkins wrote a story arc in which Banner and the three Hulks (Savage, Gray and the Merged Hulk, now considered a separate personality and referred to as the Professor) are able to mentally interact with one another, each personality taking over their shared body. He ... created General Ryker, who was in charge of the original gamma bomb test responsible for the Hulk's creation and was planning to create similar creatures.
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Unlike the Merged Hulk, the Professor was physically distinguished by having a pony tail, which the Merged Hulk did not. Jenkins justified this by retconning into the Hulk's continuity a new character named Angela Lipscomb (modeled after Jenkins' own girlfriend) who knew more about Bruce Banner than even Doc Samson. Lipscomb confronted Samson with her observations of the Professor and Doc Samson validated them, despite events presented in previous issues to the contrary.
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The Maestro - The Maestro is a version of the Hulk from a future timeline when he has conquered mankind after it had already been brought to the brink of extinction through nuclear warfare. The Maestro's green skin is darker than that of the other green skinned incarnations, and his hair is gray and balding on top. Due to the increased radiation from nuclear fall-out, the Maestro is significantly stronger than the Merged Hulk (as demonstrated in the "Hulk: Future Imperfect" mini-series), and his strength still increases with rage, making him more powerful still. Creator Peter David has stated on his various message boards that the Maestro was intended to be simply an insane evil alternate version of his Merged Hulk and not a separate personality within Banner.
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Creator Peter David has stated on his various message boards that the Maestro was intended to be simply an insane evil alternate version of his Merged Hulk and not a separate personality within Banner. The Maestro's base strength level is considerably greater than that of the other primary Hulk incarnations, including his younger self. While in a calm emotional state, he is capable of lifting far in excess of 100 tons.
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Merged Hulk