To add to your point, Google/YouTube has already floated the idea, claiming that Disney/ESPN is jacking up the price to give advantage to Disney's Hulu, a direct competitor to YTTV.
Further, YTTB has leveraged its size to garner the same deals as the cable companies. SNY and YES Network are still not on YTTB because they want too much per viewer. If Disney does not come to an agreement, I think Google will do as you say, file an antitrust lawsuit. At the very least, Disney will need to air its dirty laundry in its practices , pricing, etc. Besides, why should we have to subsidize private planes for Herbie and his dog so he can be on game day in one place and call a game a few hours later elsewhere? Sorry, Herbie can fly coach. ESPN can cut a major portion of its expenses by cutting back on "air talent."