Daniel Wu and Clancy Brown on first look seem like another pair of not well known actors joining Warcraft movie cast list, but both of them have been in the business for a long time. Daniel Wu, US born and educated is a well known actor with a Hong Kong work address and about 40 movies under his belt. His recent english language production are Europa Report and The Man with the Iron Fists.
Clancy Brown is more known face and name. He has been in many TV Shows and on occasion in some movies like The Shawshank Redemption, The Hurricane and Cowboys & Aliens, but prolly best known is his voice since he can be heard in many project from video games, animated series and all kinds of narrations. At the moment he is playing in TV show Sleepy Hollow.
So far like the other names, there is no indication of what characters they will play in Warcraft movie. Production starts in about a month in Vancouver.