The last picture isn't damage. There is a full sheet overlay stapled to the art. The logo is attached to the overlay. The waviness in the last picture is the overlay not laying flat. You can see a reflection in the Hulk's cheek, because of the overlay. Same thing in the bottom.
The brown staining up top, by the logo, I can tell you that there is a lot of water damage to the cover underneath the logo, on the art.
Hulk
Hulk's hair all wet and messy.