Hulu is one of the crown jewels here. Because of the way the contracts are structured, whoever buys Fox, gets total control of Hulu. There were some court orders that recently expired on Hulu which is part of the behind the scenes reason this war is going on now.
The breakup fee is a lot of cash here - Disney had made a similar guaranteed (2.5 billion), but Fox itself will be on the hook for 1.52 billion if they break off for Disney in favor of Comcast.
There's been a lot of speculation that part of the deal with Fox was that James Murdoch would eventually be the heir apparent to Bob Iger. That speculation faded a bit, but still something to keep a eye on.
What what happens with Hulu and with the Murdoch controlling interest in Fox. It may take a shareholder revolt to go with Fox over Disney.
I don't see this deal as a must-win for Disney. They have the possibility to go over the top with their new Disney streaming service, and they have all the content in the world right now. Disney lawyers will probably find some event to use to justify yanking the Marvel rights from Comcast if this deal goes through.