I repeat my skepticism. Guests promoting their ABC TV shows on The Tonight Show is not the same thing as ABC buying commercials on NBC. Also, I suggest you read United States v. Microsoft Corporation, 253 F.3d 34 yourself as it seems you've missed the whole basis of the lawsuit - abuse of monopoly power. Arguing that Disney has a monopoly on TV entertainment is going to get quickly tossed if that's the basis of your antitrust suit (same with the EU suits). Now, if you can provide examples of one non-monopoly service being forced to show advertising for a rival service then you may have a case.