is one piece episode 881 filler?

Two years have passed since the Summit War of Marineford. Sakazuki is now the new Fleet Admiral of the Marines.

Due to the catastrophic destruction of Marineford, the Marines decided to build a new headquarters named New Marineford. New Marineford is an even greater fortress built to acclimate to the raging pirate era.

It has become the new home of justice located at the entrance to the New World. Sakazuki is angered when he learns that Fujitora has gone to Mary Geoise.

He had only allowed the Admiral to set foot on a Marine base if he had captured Luffy and Law.