is one piece episode 672 filler?

The dwarves, Usopp, and Sugar are all shocked as a giant ship crashes into the room. Even the toy workers stop to look at the incident in astonishment.

Trebol's subordinates cry out that he has lost it, and comment on how the tower is now in ruins. Meanwhile Zoro is continuing his fight with Pica while Luffy and Viola run off fending off Pica's stone strikes.

Robin finds Usopp, who is apparently pretending to be knocked out, and wakes him up. He says that a "duck came flying through the roof," and Robin tells him to keep quiet, and that Leo's group has been captured.