No disrepect to Soulless but I would not recommend a cover, thats a lot of ink you've got there and no open skin, no matter how talented the cover-up artist, there are limits!
I second the idea of getting a bio specialist to add detail. I like the fact there are lots of colours - if you lose that, you could end up losing definition in the sleeve so from a distant it could all blend into one. It needs strong contrast to give it impact, IMHO.
I like it