basically there is no reason for superman to be a body builder. Same with venom. I realize that he should be a muscular guy because thats how he was in the comics and it makes more sense that way. But, correct me if im wrong, doesnt the symbiot add to his muscularness when he 'puts on' the venom costume? If so, then there is no reason why he cant be decently big and then digitally enhanced as venom (since venom will probably be all (at least most) cg anyway.
now if Topher is supposed to be some other villian, who are the actual villians in this one, has it been officially (or unofficially) announced...i forget, then i guess the above applies less, but i still think its a valid point.
-Darth Simon