I figured I'd contribute with my 8 seconds of Googling --
http://kotaku.com/5929157/the-making-of-warcraft-part-1
"Allen Adham hoped to obtain a license to the Warhammer universe to try to increase sales by brand recognition. Warhammer was a huge inspiration for the art-style of Warcraft, but a combination of factors, including a lack of traction on business terms and a fervent desire on the part of virtually everyone else on the development team (myself included) to control our own universe nixed any potential for a deal. We had already had terrible experiences working with DC Comics on "Death and Return of Superman" and "Justice League Task Force", and wanted no similar issues for our new game."
http://kotaku.com/5929161/how-warcra...that-saved-wow