Matthew McCoughaney is playing Randall Flagg in the Dark Tower movie

Flagg always changes looks and settings. It doesn't have to be Matthew. I don't see how he could pull it off but I'll give him a chance to prove himself

If they redo The Stand with a PROPER adaptation (the TV one was junk), they need to do a multi parter series on HBO or Showtime and bring back Matthew as Randall.