They already had to recall Moana merchandise for being racist...(i.e the Maui costume). 2. Toy analyst already stated Moana's outfit isn't iconic compared to the other princesses (No fairy tale gown) as well in the toy sales with only two characters make it harder to justify role playing compared to films like Cars and Marvel. 3. Compared to every other princess, with the exception of Merida, her toy sales have been the one with the least upward trending trajectory.
Don't get me wrong box office wise, Disney definitely has a heads up, they own three huge brands. I'm just battling this notion that Disney automatically means best thing ever in film and will do blockbusters over other films. Its not a good belief and ends up hurting consumers of Disney products more so than being beneficial.