No buyer who can afford what ABC is REALLY worth. Nexstar and Allen Media would be buying it at a ludicrous discount. ABC is worthy of at least $30 billion alone for a deal, and these companies want to steal it for pennies. (By the way, to some extent, isn't economics not that much different than astrology? Saying P/E ratios and fair values and "what the market is really worth" in saying Disney's stock price was overvalued is equally as valid as my sayings Disney is a $250 stock. You can use this concept of something that is more an art than a science, as economics is, to reach two wildly different conclusions, both equally valid and solid in sourcing and data points. If anything, it just proves that "no one knows anything.")
Antitrust is more a concern for the truly big buyers, the Comcasts and the like, the only such buyers who could get the network at a fair value.
Linear broadcasting is definitely not growing, but it's far from dying, even though the takeaway has always been "dying." If anything, linear broadcasting and streaming can not only coexist, but help each other. The world is really a case of a rising tide lifting all boats in this instance. You can't shun one for the other, in either direction, because it means throwing away perfectly good money. And Disney, while certainly focusing on streaming, is not going to neglect linear TV at all, because they know there is still great value there.