NEW YORK — Access Industries’ $3.3 billion winning bid to buy Warner Music Group adds another media company to Len Blavatnik’s empire and sets the stage for a possible bid for rival EMI Group. Blavatnik’s all-cash deal for Warner values the world’s third-largest music company at $8.25 a share plus debt. The acquisition adds to Blavatnik’s roster of media companies such as Russia’s Amedia, Scandinavian mobile data and voice services […]