is one piece episode 766 filler?

After Pekoms reveals that Sanji comes from a family of killers, Luffy replies that he does not care, and only wants to know if Sanji will come back or not. He states that although he is fine with Sanji getting married, he does not want to serve Big Mom, and so the Big Mom Pirates will have to serve him instead.

The audacious statement causes Pekoms to go hysterical and bump his head on the wall, causing him to bounce and fall out of bed, which inflames his wounds.