The wall dragon

The story goes as follows:
At my karate school my instructor (and the guy who owns the place) decided to rearrange everything leaving one wall massively blank where weapon racks used to be. And the fact is that every time I see the freakin' empty blue wall it bothers me. So I suggested a mural and that I could paint it, seeing as how I have done large scale paintings before. So he asked for sketch's and this is one of the ones I came up with. (and my favorite.)
 
This guy is going to be dark blue and gold with a background and stuff.