Bedrockgames
I post in the voice of Christopher Walken
On the other hand, I think it should be totally possible to play with casting in a Conan movie and yet fully capture the spirit of REH. It is important thematically that Conan be a barbarian, but his being white is - in my view at least - thematically extraneous (though obviously of great personal importance to REH), provided that the rest of the casting and broader framing properly incorporated Conan into the "civilisation" that was being presented.
One thought on the whole civilization thing in Conan. An aspect of the story I've always liked is that Conan has very little fondness for it and we tend to see it through his eyes. A lot of his internal dialogue is bafflement at the way of life in cities (I may be over-remembering here, as I can't honestly say how many times I've seen this kind of internal dialogue, it just sticks out in my mind).