I like the concept and the setting but the overdone HDR really gets in the way for me, here. Processing should never distract from the real subject in a photo and it really does bother me in this photo. Do you really need the HDR? I don't think it adds anything to the content at all. Maybe you could try again and leave the HDR out of it? I think you've got a great basic idea and the brothers are an excellent subject. I believe they and the two images their holding should stand on their own if you photograph them well.
Photo-John
