It's been a few days since Ganishka blowing up and Mr. Boss Man was having trouble catching up with the Seahorse until the ghosts he had yet to see after 25 years of sailing the Seven Seas took over the ship and possessed the crew.
Roderick was ready for round 2 but the Ghost Ship being able to dive down to dodge cannon fire and float back up without any consequences made him believe that his special guests are right for the job. And he wasn't wrong, everyone took it as the same old routine, especially Guts who just put on his arm with a vibe that screams "Here we go again..."