Wow, it's actually happening. Crazy. I'm on the fence about Elba, but I'm hoping he proves me wrong. It has nothing to do with race, actually, I can think of several black or hispanic actors that would work for me. There's something about Elba's aloof/nonchalant acting style, though, that I don't really buy as Roland, but he's a good actor, so I'm hoping he will, well, act.
Matthew McConaughey was slated to play Stu Redman in a The Stand adaptation which was just postponed (again), and I'm really glad that never happened. He's a perfect Man in Black. It would be boss if he could play Randall Flagg instead in a future The Stand adapatation. When I re-read The Stand recently, I kept picturing McConaughey's face and voice. It just felt right.