How annoying

I just read on Angry Asian man that some white dude will be playing Genghis Khan in a Russian/Mongolian movie called Mongol . When I was in Mongolia, I did hear several rumours about a movie about Genghis Khan. There were even rumours that the Japanese government, or Stephen Seagal would be footing the bill for the project. I will probably go see the movie, but am I really supposed to believe that this guy is the Great Khan?