Nice work. But I still think that the head is too small for his body. I know HULK the man himself right, but with such huge shoulders, if you could increase the head size would be better. Without the rest of the body, it looks awesome, but with the whole body showing the head is still way too small.
I know his head is smaller comparing to his body, but at the moment his head is way too small...

If you could refine his abs a tiny bit more would be better.

Some references, hope it will help.