But Fox's move Wednesday shows its own determination to control all of Sky - a long-cherished goal of Rupert Murdoch's. A month after 21st Century Fox had accepted the House of Mouse's $71.3 billion bid to acquire its film studio and TV assets, an impending lawsuit from a Fox shareholder could bring proceedings to another halt.
The big question may be for Disney who, if the price goes any higher, may start to think that the company they want to buy - Fox - is overpaying for Sky, which in turn means they are getting a worse deal.
Fox has increased its bid by just over 30% since its first offer in December 2016.
Both Comcast (CCZ)and Fox see value in Sky as the media companies compete with the likes of Netflix and Amazon in Europe. If true, this would be in violation of security rules and may well block - or at the very least stall - Disney's acquisition of 20th Century Fox and its precious entertainment assets. Sky shares closed at 15.15 pounds.
Disney and Comcast are also locked in a separate $70 billion-plus battle to buy most of Fox's assets, which include the 39% stake of Sky it already owns and the rest of the company if it emerges triumphant in Britain.
Comcast has said that Sky is very important because it could take the USA -bound cable and internet giant into global markets.
Disney's bid to buy out the majority of Fox's entertainment assets was the talk of the town past year, until the two companies hit a roadblock - an anti-competitive complaint by the Department of Justice. According to some shareholders, that has set an implied higher floor for Sky's shares.
"Investors are now close to doubling their money as a result of the bidding war for Sky, and there may yet be another twist in this tale which will swell their coffers even more", Laith Khalaf, a senior analyst at Hargreaves Lansdown said.
"It's too low", Odey, a former son-in-law of Murdoch whose eponymous hedge fund is a Sky shareholder, said of the sweetened Fox offer.
Fox said it had secured the agreement of the independent committee of Sky for the deal. News Corp., which is controlled by the Murdochs, withdrew its bid for Sky soon after. The media mogul's previous effort to buy out the rest of Sky foundered amid Britain's 2011 phone-hacking scandal, which hardened opposition to Murdoch's influence over the United Kingdom media landscape.