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 ...

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.

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.