The reference picture you are looking at is messed up, first of all that's Tien powered up and flying, so of course his muscles are gonna be huge, of course his shoulder will be higher up, and of course his neck will be thicker....
If it was Tien powered up, he'd have a white aura around him, and he'd be alot bigger. I think the reference pic is fine.
I think his chest and arms look to "soft". If you could get them more chiseled, that would be nice. Other than that, like I said, it's looking really nice.
Correct me if I'm wrong, but this will have to replace another character, right? In order to make a whole new character he'd have to mess with the code? Who would you put this in place of? And, 1 more thing, are you going to make another, for his transformation? Maybe one with a shirt, and this could be the next level? I don't know, just throwing idea's out there. I'm glad somebody is finally giving Tien the respect he diserves.