recycling castles, way to stay green

So Russel Crowe has been filming the new Robin Hood movie, and there has been these pictures of him riding horses and such. Well apparently, they are going to recycle the castle which was built specifically for the Robin Hood movie for the new Harry Potter movies. Way to go producers, being all green and recycling. I wonder was castle it will be in the last book??? Perhaps it will turn into Luna's home??? Or the Malfoy's home??? We will just have to wait and see!