Disney:

What is Premier Access?

Starting September 4, with Premier Access, you can watch Mulan before it’s available to all Disney+ subscribers. Disney+ will offer Premier Access to Mulan for $29.99 on disneyplus.com and select platforms, including Apple, Google, and Roku. Once you have Premier Access to Mulan, you can watch as many times as you want on any platform where Disney+ is available. Your access to Mulan will continue as long as you are an active Disney+ subscriber.

However, that also seems to indicate that other platforms, like Amazon Fire TV, Sony PlayStation and Microsoft Xbox, might not have the ability to support buying the movie in the Disney+ app on their devices. Based on the FAQ for Premier Access, it appears that once you buy the flick, you’ll be able to watch it anywhere there’s a Disney+ app. That could change before it arrives on September 4th, but it’s yet another wrinkle in the confusing rollout of Disney’s direct-to-home blockbuster release.