really great, I’m a huge fan of terada, i have an original sketch when I saw him back in 2000.
I think you need to work on his face a bit more, in the drawing he’s more ferocious/crazy, his mouth is open a bit which adds to that. Yours, his mouth is closed. Check out his fangs. In the drawing they are tip to tip, in your they are overlapping because his mouth is closed. Aside from that… it’s insanely good.
Funny, I was thinking of modeling one of his girls… 
Looking at it more… you have the side of his mouth completely rounded. I think it should be much sharper and back further on the right side (his left).
I wonder how he’d do up against the other Son Goku…