No, the main castle is not new.
It's a smaller version of the 4866 Red Falcon castle, which was already the smaller castle of that batch opposed to the Yellow Lion castle.
It's using the same parts for the castle, save for the sticking out parts this one has on the walls on both sides of the gate. It does have notably less wall pieces and the part with the roof is also clearly smaller.
Also no forge, one less clicky, no horse, no furniture, less weapons... It's just a big downgrade. They would have been better off simply reissuing the 4866 castle really.
