ya, I think he can pull off the look
with the height issue, that can possibly be corrected on screen
with the height correction, I think the size issue might work out as will, as he will look more proportionate to his body type, which once enlarged will look pretty good
in fact, I was almost thinking that with him being short, once enlarged on screen, his body type might actually give him a bigger look, then, say even, Routh had
cause, he will still be well proportioned, in ratio to his size
I think part of the problem with Routh, where he kinda looked skinny was his height, and body type, with his height, his arms, neck, even legs, were long and lanky, which gave him that skinny look, no matter how much muscle he put on
so, with a shorter guy, who they'll most likely just enlarge on screen (green screening or camera angles, what not), his arms, neck.... will not look as lanky, and it will not take him as much work to for him look bulkier
btw, here's a quick colorization, of that pic, (just cause i was bored)
(^ click to see full size)