Greek Gods worked because it's not really licensed.
Let this be a lesson to other countries: trademark your pagan mythologies!
Saw this on Facebook: https://www.facebook.com/watch/?v=360682822496668=> The first promotional video with all the sets!
(Technically not medieval of course, but maybe this will be an occassion to start collecting the Roman Theme too)
The tree house would make an excellent cottage without the tree. You could create a small settlement with them. So many great new pieces coming.