"Show, don't tell" is not an absolute dogma. As with anything else, it depends on the needs of the particular story. There are cases where getting the exposition out of the way with a quick narrative infodump is the right choice because it lets you get on with the important part of the story. I don't remember Brave
well enough to recall how I felt about the exposition, but one shouldn't just make a kneejerk assumption that telling is invariably inferior to showing. Rules like that are guidelines, not straitjackets.