is one piece episode 927 filler?

Big Mom has lost all her memory from King's attack, even forgetting her own name. Chopper, who wants to avoid reminding her that she was an Emperor, lies, stating that her name is Olin.

Big Mom believes him. Meanwhile, Orochi retells the "ghost story" of Wano and the prophecy told.

He states that as this was the twentieth anniversary of Oden's death, the Nine Red Scabbards are bound to make their return as ghosts and restore the Kouzuki Family's reign. He is already aware of the intruders that entered Wano Country, Zorojuro and Sangoro, and suspects that they are allied with Kin'emon.