is bleach: thousand-year blood war (bleach: sennen kessen-hen) episode 13 filler?

With Ichigo Kurosaki standing in Karakura Town and announcing that he is leaving, Isshin Kurosaki questions how he intends to get back to the Soul King Palace, prompting Ichigo to look back at him speechlessly just before Mera Hiuchigashima appears in the air behind him in a puff of smoke, notes that the timing is perfect, and tells Ichigo that they are going. Moments later, Ichigo finds himself standing in the pit in the Hōōden before Ōetsu Nimaiya, who looks down at him from the entrance.