Brave is being advertised as being Pixar's first fantasy movie, which leads to the question as to how the cars in Cars and the toys in the Toy Story movies were moving about on their own but I digress. It's also their first movie to have a female protagonist, which is good in my opinion. Pixar and Dreamworks have some up with some interesting female characters in the past, but the fact that Pixar hasn't had one in the lead role is kind of weird.
It's being directed by Brenda Chapman, who directed Prince of Egypt and who is Pixar's first female director, and the lead, Merida, was originally going to be played by Reese Witherspoon but they got rid of her midrecording and replaced her with an actual Scot, in the form of Broadwalk Empire's Kelly MacDonald.
Wait, Entertainment Weekly have a proper synopsis,
"Brave is set in the mystical Scottish Highlands, where Merida is the princess of a kingdom ruled by King Fergus (Billy Connolly) and Queen Elinor (Emma Thompson). An unruly daughter and an accomplished archer, Merida one day defies a sacred custom of the land and inadvertently brings turmoil to the kingdom. In an attempt to set things right, Merida seeks out an eccentric old Wise Woman (Julie Walters) and is granted an ill-fated wish. Also figuring into Merida’s quest — and serving as comic relief — are the kingdom’s three lords: the enormous Lord MacGuffin (Kevin McKidd), the surly Lord Macintosh (Craig Ferguson), and the disagreeable Lord Dingwall (Robbie Coltrane)."
Some concept art and what is possibly an early screenshot,