During an interview late in 2014, he said that they were still exhausted from the ordeal of making the first film but they really love the characters of “Big Hero 6” so they could always look forward to working with them again in the near future because it obviously appeals to their senses, as well as the millions of viewers worldwide too.
Those who have seen the successful animated flick “Big Hero 6” know that in addition to Hiro Hamada, the other big star of the movie is the robot Baymax.
It can also be recalled that although Hiro is an inventor, Baymax was not his invention but that of his brother Tadashi Hamada, and was primarily meant to be a care provider.
Unfortunately, Tadashi died in “Big Hero 6” after an explosion during the science expo. But accordingly, he may have survived it as well just like Professor Callaghan, who turned out to be Yonkai, the main villain in the film.
Based on speculations, just like Professor Callaghan in the first movie, Tadashi will still be alive and shall return as the villain Sunfire. In the comic books, Sunfire is an original member of the Big Hero 6 and his superpower is his capacity to withstand excessive heat.