is one piece episode 507 filler?

In the Calm Belt the Heart Pirates notice a huge Sea King fighting. A man comes out of the sea.

They are surprised to see Dark King Silvers Rayleigh. Rayleigh remarks that they have met at Sabaody Archipelago.

He says that his ship sank in a storm and he had no choice but to swim. He asks Trafalgar Law seeing the straw hat, if Luffy is on the island.

The scene shifts to some Kujas who have just gone to deliver food to Luffy. Meanwhile, all the women of the island discuss Luffy.

Boa Hancock imagines Luffy as her husband and Nyon lectures her as usual.