Consult with a tattoo artist THROUGHOUT the design.
As interesting as some of the stuff is, I can tell you for a given that as is, even if you’re lucky skin-wise and put yourself in the hands of an extremely well seasoned artist, it will bleed off all the white insets in just a few years, about at the same time when the bats closer to the cape will be smudged out to non-descript shapes.
That’s unless you plan on having it across your whole back, in which case separation should hold to that size 
It helps if you have other, older tattoos too to know what level of dispersion and blur your skin will induce.
That graphic-y style is also not how you normally evaluate a tattoo.
Unless you plan on having the window/framing inked as a white out (which is next to impossible to have paper white, let alone backlit monitor white), you might be in for a surprise.
Put the line work that will be stenciled out down first and flip frequently. Most importantly, get a consultation with a tattoo artist on the design process or buy a couple books (if you haven’t yet).
Sorry, this might or might not be the feedback you were after, but one of the number one mistakes I see artists doing when they design their own is thinking that rendering and framing a tattoo works the same way as graphic design or normal illustration. The rules are very different when your media is ink under skin.