The idea for Big Hero was loosely based on the Marvel comic book series; however, it only has the title and main character names in common.
In order to blend eastern and western culture, the movie is set in a city, combining Tokyo and San Francisco, called San Fransokyo. Animators even went to both of these cities for design inspiration.
It took Disney 4-5 years, to develop this film and its story.
Animators based the character, Baymax’s, movements on penguins.
Big Hero 6 is known as having the largest cast in a Disney animated film. There are 15 main characters and at least 701 other characters in this movie.
This is the first film, in which Marvel and Disney Animation, worked together to create a movie.
Alan Tudyk, the voice actor of Alistair Krei, is also known as being the voice actor of the Duke of Weselton in Frozen and King Candy in Wreck it Ralph.
Big Hero 6 was a part of both the Tokyo International Film Festival and the Abu Dhabi Film Festival.
Animators used a Japanese bell and rice cookers, as inspiration for the shape of Baymax.
The animators used ants as inspiration for the Microbots. At one point during the film, 20 million Microbots can be seen at once.
In order to gain better perspectives for the emotional aspects of the story, Big Hero 6 film creators, talked to social workers who primarily work with teenage kids struggling with depression and grief.