http://katanaz-stock.deviantart.com/gallery/#/d144fb0

quote "If you want to use my stock out of DA ask me first"

i dont see where in your sbs you have permission from this guy to use his picture outside of deviantart. Nor any kind of reference letting him know this picture is being used.

Looks really good, id look into adding some shadows from the statues and island if the light behind is so bright, also the city nor the statues (far left statue looks great, maybe just some slight level adjustments on others) would be so lit from the front.. mainly from the back based on the background light looks. Also if you added a reflection of the island on the ocean to give the feeling it was really floating over the ocean i think this could look really amazing.