is one piece episode 707 filler?

In the present as Law clashes with Doflamingo, he recalls Rosinante's declaration of Law's freedom to Doflamingo before the latter murders him. However he laments that will not be truly free until he accomplishes his goal of stopping Doflamingo's madness.

Law creates a "Room" around them, and tosses a pebble behind Doflamingo. As he does so, he asks him what he thinks of Monkey D.

Luffy, considering Law has now learned today that Doflamingo was a World Noble. He then uses "Shambles" to switch places with the rock, thus teleporting behind Doflamingo.