In late September, TMCnet editor Stefania Viscusi reported on the possibility that Walt Disney Internet Group, after announcing the shutdown of its Disney Mobile phone service on Sept. 27, might be out of the mobile virtual network operator (MVNO) business for good.   The answer to that question is “Apparently not,” at least not for now. Wall Street Journal reported today that Walt Disney Co. and Softbank Corp. (a Japanese mobile operator) are teaming up to introduce a mobile phone service in Japan. The service will be called… drum-roll please… Disney Mobile.