is one piece episode 511 filler?

The episode started with a view of Marineford being rebuilt. It showed a room full of vice-admirals as Lieutenant Commander Brannew talked about how Luffy is revealed to have survived the Summit War of Marineford and caused trouble again.

A flashback followed, showing what happened two days ago. Two reporters are seen talking about how the Marines will go after the pirates involved in the war.

Suddenly, some Marines see the warship which Luffy, Jinbe and Rayleigh are on. They made a full circle around Marineford before entering the bay (which is done in a funeral).