I'd love to see how a claim with the antitrust authorities will hold up about Apple having an (iPhone) monopoly and abusing that somehow to get a monopoly in the headphone space, which is served by a bajillion manufacturers already providing many wireless and some lightning headphones. Don't forget Apple is also shipping the adapter that keeps all those minijack devices working.
No matter how many times people want to try this, Apple doesn't have a monopoly when it comes to the mobile/smartphone (hardware) space.