Courtesy of brickset:
http://www.brickset.com/detail/?set=41051-1
I don't think this is a leak, since they come from someone who purchased the set. And I think castle might the appropriate forum, since most of the princesses' stories took place in medieval times and Merida, clearly comes with a castle.
I like that door. And a gold bow is pretty cool. And since they are medieval-ish, they might make for suitable giants?
There are some other set pictures there too:
http://brickset.com/news/article/?ID=8146
Steve