is bleach: thousand-year blood war (bleach: sennen kessen-hen) episode 24 filler?

Over a thousand years ago, within Silbern in the capital of the Lichtreich, Yhwach sits at a table across from Ichibe'e Hyōsube, who explains that he has come as a Balancer overseeing the Human World, Soul Society, and Hueco Mundo to propose a non-aggression pact between Soul Society and the Lichtreich. With Seydlitz, Huburt, Algora, and Nikita standing nearby, Ichibe'e proposes that Yhwach should let the Balancers worry about the world while he enjoys the prosperity of his empire.