I think Disney is closer to this than it might seem. I agree that Disney doesn't need to create any social media platforms, they're already leveraging existing ones. I hope they DON'T fall back on the old tools that "worked" under the old paradigm, but I'm afraid that under the pressure of this in-between time, they'll panic and reach for old-model solutions like longer commercial breaks, premium channels, popups, etc. rather than innovating them like I know they'd planned to do.
For any AR/VR to work you need massive wide audience adoption of another piece of tech. Basically everyone in your family needs a headset. That's a major hurdle.