Found this while discussing the lack of BH6 representation. It's official because it's one of Disney's sites. Some of this merchandise hasn't been seen yet, as far as I know.
In Japan, the film is called "Baymax" (ベイマックス). This link will search "ベイマックス" on Disneystore, showing all of their products. When their December release date gets closer, and they create a page, I will link to that instead.