10 Strongest Forms Of The Hulk
4. Maestro
While Old Man Hulk presents a horrific view of the future, another possible future sees the Hulk evolve into the being known as Maestro. In Future Imperfect, the modern Merged Hulk finds himself taken to the future where he meets himself, only he's far more powerful... and insane.
Maestro became the ruler of Earth, but only after he killed every other superpowered person he could find, be they ally or enemy. With nobody left to oppose him, he took the throne and went mad. Being an older version of the Hulk, he was ridiculously OP compared to the Merged Hulk.
This was the result of an increased level of gamma radiation, which built up over a long period of time. That infusion of radiation exponentially boosted his strength far beyond any previous incarnation, and he beat the ever-living crap out of ... well, himself when Maestro and the Merged Hulk met.
Maestro's base level of strength is much higher than the modern Hulk, but unlike his younger self, he has a limit on how enraged he can become. His insanity keeps him from going the full rage monster, but even with that limitation, he's still one of the strongest Hulks of all time.