The frontrunner for the role for Nathan appears to be X-Men star Hugh Jackman. "Jackman is who I'd like to see. I think the producers would like to see Jackman too, because he has that tough guy exterior," North explains. But, Jackman can bring more than just muscles to the character. "There's also a lot going on behind his eyes. A lot of emotion and sensitivity on that brusque exterior, and he has great comic timing."
Oh, and he can sing and dance, too. Just in case we needed a musical featuring Nate and the gang.