LOS ANGELES — The Walt Disney Company reported its strongest quarterly results in two years on Tuesday, streaking past Wall Street expectations for profit and revenue growth thanks in large part to the success of “Black Panther.” But that strong performance was shadowed by maneuvering by Comcast to upend Disney’s pending acquisition of 21st Century Fox assets.

Robert A. Iger, Disney’s chief executive, struck a $52.4 billion all-stock deal in December to buy most of 21st Century Fox, the conglomerate controlled by Rupert Murdoch. In a securities filing last month, Fox disclosed that its board had spurned a competing bid from Comcast that was 16 percent higher on a per-share basis because of antitrust concerns and the belief that Disney shares would be more valuable over the long haul.

But Comcast — the same Comcast that tried to swallow Disney in 2004, an attempt Disney fought off but has never forgotten — is now weighing a hostile bid for the Fox businesses. Over the past week, Comcast has met with investment banks to line up roughly $60 billion in financing to mount an all-cash push for Mr. Murdoch’s entertainment empire, according to two people briefed on the conversations who spoke on the condition of anonymity to discuss a private process.

Comcast declined to comment.

Mr. Iger, speaking on a conference call with analysts after Disney reported a 23 percent increase in quarterly profit, presented the deal as a fait accompli. “We are confident that the assets that we are in the process of acquiring easily fit within our new structure once the deal is approved,” he said, referring to Disney’s recent reorganization.