I disagree he has never shown me anything but bad line delivery and looking strong. If he were to be in the movie I would rather someone like him be a supporting role, he would work better as that. If he were good enough he would be in more movie roles. Hollywood wouldn't pass up on a handsome, strong young actor if he had talent. He looks like a COG but that doesn't mean he should play the role.
With Len Wiseman attached and how he casts I doubt someone like Dominic would be a consideration for the lead considering he's cast well and bigger in most if not all of his movies with Bruce Willis, Bill Nighy, Michael Sheen and Kate Beckinsale in Die Hard 4 and the Underworld movies. I think Wiseman thinks bigger considering he wants an actor to carry a trilogy.