Courtesy of another beautiful, dedicated tumblr 粉丝 (smallhirodork @ tumblr), 你 can download the entire Hiro's Journal book, which details Hiro's point of view of all the events of the film. Needless to say, major spoilers.
In Japan, the film is called "Baymax" (ベイマックス). This link will 搜索 "ベイマックス" on Disneystore, 展示 all of their products. When their December release 日期 gets closer, and they create a page, I will link to that instead.