is one piece episode 727 filler?

Luffy's Gear 4 punch sends Doflamingo flying through several buildings, and the citizens below stare in awe, deciding to cheer Luffy on despite not knowing who he is. On the Flower Field, Cavendish watches Luffy's new form in astonishment, but Law says that Luffy is overusing his Haki, confusing Cavendish.

On the palace rooftop, Jesus Burgess searches for Luffy and sees him bouncing through the town. Koala, who hides behind a pile of rubble, remembers Burgess from the Corrida Colosseum and wonders what he wants with Luffy.