is one piece episode 653 filler?

On Green Bit, Doflamingo is telling Law about how the twenty kings created the World Government. Nineteen of the twenty families decided to move to Mary Geoise, the Nefertari family being the only one who did not go.

The descendants of the kings, the World Nobles, still live there today. This meant nineteen countries had to elect new royalty and new families were established.

He says that the new ruling family in Dressrosa was the Riku Family, while the family that left for Mary Geoise was the Donquixote Family. Law then reacts shocked as he realizes Doflamingo's heritage.