Hey DS!
It's Castle Grayskull.
Mattel is releasing the classic castle, but bigger (almost 1/4rth bigger than the old one -which was already huge), compatible for the MotUC line.
I don't remember well the price, but for us here it comes down to 1k because our damned custom taxes, and shipping (size and weight increase price of course).
Here's a comparison pic between the old one (left) and a maquette of the new one: