Jason is cast as Khal Drogo, a Mongol like steppe warrior chief in HBO'S upcoming series Game Of Thrones (which I'm greatly anticipating, having read and loved George RR Martin's "A Song Of Ice And Fire" books).
A very good choice for that role, but Conan? Hell no. First of all he's not big and muscular enough, and secondly, he's HALF HAWAIIAN. For fuck's sake, can't they get this shit right?
And actually, Arnold wasn't the best choice either. He was muscular enough, but they didn't even darken his hair. Conan's hair was black. And believe it or not, Arnold wasn't tall enough. Conan was "nearly a giant", over 6 1/2 feet tall. Looks wise, Lou would have been a better choice.