If you want to use your money to show Disney you’ll support them if they make more movies about folklore from other cultures, buy a copy of Arjun: The Warrior Prince instead of a ticket to see Frozen on November 27th. The film was written and directed in India, Inspired by the Sanskrit epic Mahabharata, and co-Produced by Walt Disney Pictures.
Supporting Disney’s effort to branch out and give studios in other countries funding to tell their own stories does more to show them the direction you want them to head than skipping another movie they’ve made. Boycotting one movie tells them what you don’t like, supporting another shows them what you do.
Plus, if they see movies like this selling well in America, it stands a better chance of convincing them to make more like it in America.