Wow. I'm not sure about this piece. My first thought was 'wow that looks great, but what the hell's the red there...'.
I'll start with the text. I like it. I love the divider, the simplicity of the text, and it's placement. Not sure what, or why you have that text under LEGEND though, care to explain? I can't even read it, really.
The 'weight' of this sig seems a little unbalanced. The brushing in the background, is uneven on both sides, and really drags to the left side. It builds up behind him, then just drops off on the otherside. I'd look into probably adding some more brushes to the other side, to even it out a little (sort of have a circle look going on behind AJ). Possibly add another picture of AJ, like you've done on the left hand side, to the right side. I think that'd build it, with some more brushing to blend it in.
Theres a random looking brush on the right hand side, like you ran out of time and just did a straight stroke along the bottom. The big thick one there, I don't like the look of that.
The light blue/red colour scheme never works, in my honest opinion. I like that you've taken the colour scheme then left the belt red and gold. I just don't think it works, when it's these two colours.
I really do like this piece, the more I look at it. Room for improvement, but none the less that's usually the case with any piece. Nice work C4.