is bleach: thousand-year blood war (bleach: sennen kessen-hen) episode 16 filler?

In the Wandenreich city occupying the former location of the Seireitei, an army of Soldat advance through the streets and attack the Shinigami of the Seventh Division, where Lieutenant Tetsuzaemon Iba blocks one of their swords with his Zanpakutō. While 5th Division Lieutenant Momo Hinamori is pushed back across the ground by other Soldat and forces herself to halt by embedding her Zanpakutō in the stone, 4th Division Lieutenant Isane Kotetsu hides from more Soldat.