I am sure that the Developers have the land and would build with a contract from a company that does Malls. BUT the economy is down and not too many such businesses are expanding.
You don't just tell someone to rent from you because the people nearby think they want a business, there has to be valid research on the support of new business and a committment from the company that would run the Mall..
Lots of Malls across U.S. are in trouble and stores are going dark.
I am sure if the developer could find business for a mall they would build it and lease it out.
Related story about where new malls in world are being built;
http://www.forbes.com/sites/kenrapoz...alls-in-china/