The drawing was beautiful, but the painting above is a pain.
Watercolors = SUICIDE
You could build up way better tones with acrylic washes for example. They do act like watercolors, if they are soluted. And when a layer is dry you can place another glace on the top. golden acrylics are just pefect.
I can't tell if you were afraid to use more vibrant colors and loose your line work, or if it is intentionally light.
I threw it in photochop and was looking at it with levels and it looks like the color and the line work are in competition. Particularly in the legs with the shading. The top half looks good, but when you get to the legs your hatching gets lost in the color (Now I did darken it until the ink fill disappeared and it had a "uniform" blackness overall more like a finished print than a sketch but you get the idea)
You might even try it without line work at all. Though the line work is sweet.
You might be surprised at what you get with watercolor alone.
you may still be able to get some of it back (although i don't like your chances) if you wet the areas you want to see the detail in and get some cloth or paper towel and dry it. It should pick up some of the pigment. It's as close to a rubber in watercolours as you are ever likely to get!
I think that would been much better with a little change in Spider-Woman left leg pose! Or maybe if we had her flying, instead of being on solid ground, but it's still a high level detailed artwork that I won't be able to achieve in twenty years!! Thanks for sharing great stuff like that with us, and I hope my lil' comment didn't upset you!!