Actually its VERY wow themed, thoise pictures dont do it justice at all.
I saw a 5 minute special on the restaurant on the news last week, all that I was thinking was "holy shit, they are getting sued"
It's actually done VERY well, looks awesome, they have tons of wow murals and the menu is based on wow food etc.
EDIT:
Found a shortened version of the news article I mentioned.
CCTV.com - Beijing restaurant captures online game trend