I did the zbrush sculpt for Quan Chi, and concept was done by Justin Murray http://www.justinmurrayart.com/Home.html
This guy was a lot of fun to sculpt. He took about two and half work weeks to finish. Two weeks for the overall sculpt, but there is generally a period of 2-3 days where the Art Lead (Aaron Hall) & and Art Director (Steve Beran) make final changes or tweaks. Sometimes what works in concept art doesn't always hold up well in 3D.