Bruce Banner has been trapped in Hulk’s traumatizing mind-prison for some time now. However, it seems some wires may have been crossed, since it's actually known as the " Hulkscape " in that series.

The struggle between Bruce Banner and the Hulk is one of Marvel’s most enduring battles but this dynamic struggle reached a head when Bruce Banner created Starship Hulk by combining science and ...

As Bruce Banner‘s alter ego is fond of reminding people, “Hulk is the strongest there is.” However, while the Jade Giant is renowned for his strength, he has other powers as well. These ...

To be alone. The Hulk is the embodiment of Bruce Banner’s repressed rage. He is raw and powerful and unyielding, but now he has turned himself into something else: an uncaring entity.

This means he could have been in New York during the Void’s attack in Thunderbolts*. Bruce Banner’s history is full of traumatic events that could have spurred the savage Hulk to reemerge.