Well the influence of Hollywood movies in Japan has been declining for a while now so I can't say this isn't unrepresentative of a broader trend in Japan.
The world’s third-largest box office is dumping western movies for local animated hits. Hollywood needs to pay attention.
www.bloomberg.com
Getting a bit off topic, but as a whole American culture does not have the influence it once did for the average Japanese. The "boomer" generation of Japanese loved American and wider Anglo culture (and still does), but younger generations of Japanese seem much more captivated by domestic and other Asian cultural products, particularly Korea.
I've heard both Diagon Alley and Zelda rumored (just what I've read, I have no insider info).