Grupo Marsans doesn´t own the Spanish charter longhaul Air Pullmantur any longer, but still has roots in it, and manage the airline. Air Pullmantur operates exclusively to feed Pullmantur Cruises ships.
Originally they had announce the intention of ordering A380, since they normally use two B747 for each operation. With the transfer of bigger ships from Royal Caribbean Cruise Line to Pullmantur Cruises (now owned by the american company), more seats are needed.
So I assume the A380 will be used/leased in that high configuration when Air Pullmantur needs them. For the moment they are adding two extra B747-400 in january. Cruising "Spanish way" is booming and the growth is simply stupendous.