is one piece episode 557 filler?

Daruma begins digging underground. Hyouzou is disorientated and Zeo reminds him that he is in Gyoncorde Plaza.

Hyouzou notices Zoro and Brook and comments that the Straw Hat Pirates has good swordsmen before being on the move, killing his own subordinates in the process. The enemies run away at the sight of the Brachio Tank V and Chopper says that they should use this opportunity to attack their officers.

Daruma appears right in front of them and Chopper commands Usopp to fire. As Usopp prepares to fire, Daruma leaps into the ground and disappears.