Go to my website and download the "red hulk" palette I did for MGMurrow's hulk. Extract a sprite with that palette using fighter factory and improve on the sprite.
There's not a really huge difference between red and green hulk's form. The biggest difference is in the little things like red hulk has scraggly hair and yellow eyes. Also if I am correct, red hulk gets bigger overall.
Just figured it might help. You've got the colors all right, but the outlines don't seem righht. I dunno why. And the hair is very "clean" for a more violent hulk.