The whole movie is up on youtube.
The parts where he speaks english are when he is in Thailand, not that its a big deal for you if you speak his natural language.
His acting has been mentioned by a lot people. Look at the comments on his IMDB page, or just do a search for reviews of the movie.
Kim Kold the man does not behave anything like his Introvert character, that was all acting.
He has down the most critical part of acting, which is the ability to emote, with Facial expressions and Eyes.
http://blogs.indiewire.com/spout/teddy-bear-review
http://www.hollywoodreporter.com/review/teddy-bear-sundance-film-review-285456
http://www.starkinsider.com/2012/01/film-review-teddy-bear-sundance-film-festival.html
I was watching the movie, and realized its not just his inhuman physique, more Gorilla like than human, but his FACE also looks like Darkseid.
It could be the years of steroid abuse has done to him, resulting in a granite like mug.
Anyhow, the guy actually can act, at least well enough to be used in some capacity by a visual effects team. If he were used likely it would only be in some sort of visual capacity and greatly enhanced with CG. The benefit of having real muscles on a component of the visual effect is that they move in a natural way, and does not look like a rubber suit.
Have the make up/costume team go over him, add the visual effects used to make Xerxes look 9ft tall in 300, and you got a guy who really seems like Darkseid come to life.
Obviously he would need to make it past an audition, but his look (not just muscle but face) and talent he has so far shown should at least warrant him that. That is if they ever even would use a villain like Darkseid.
The funny thing is, even the people who have said that "its impossible for a bodybuilder to act" - none of them dissagree that his face had an odd resemblance to Darkseid.
Darkseid is also not quite as massive as characters like the Hulk, and Snyder DOES have a history using a bodybuilder for a body basis in the Watchmen, yes a middleweight bodybuilder was used for Dr.Manhattan's body. Just heavily enhanced with CG.