The battle for the soul of the Murdoch empire is like a game of Russian dolls – and not the nerve agent infected type we’ve been hearing about in the news. Initially Disney had offered to buy the bulk of 21st Century Fox TV interests, and in a clear and direct response, Comcast countered that it would make a direct offer for Sky, a separate public company in the UK, only partially owned, but effectively controlled by Fox. The latest turn of events is that Disney is prepared to buy Sky News, a tiny part of Sky – which to date has been at the heart of the UK finance regulator’s refusal to allow Fox to acquire the 61% of…