in theory
Putting the onus on the defendant in trademark issues is the reason companies pay to have trademark registration (R) rather than just declaring (TM).
But with actual goods, there's some evidence to work with. In this cases, there's nothing done yet. A finding against an unused ambiguous brand/domain name combo could be like finding in a trademark case on the basis the trademark owner had heard that a company was thinking about producing something with a similar name but not actually done anything yet.
I suspect Netflix will just have to watch the domain like a hawk in case owner does try something a bit infringing. The owner could sell it to Netflix, but would have to tread carefully lest it look like an attempt at a shakedown.