History
A dark entity switches dimension, seeking a body strong enough to house its energies. The Hulk is the strongest, so it picks Bruce Banner to take over. She-Hulk must enlist the aid of Dr. Strange to go inside Banner's mind, where the energy being is destroying the goodness inside Banner. But they have to convince both Gray and Green Hulk to help them on the inside of Banner's mind, when in the outside world, Banner has already reverted to the monstrous Dark Hulk.