is bleach episode 294 filler?

As a pillar of flame appears behind Aizen, Yamamoto emerges from it. Telling him his appearance is too late, for he is the only captain of the Gotei 13 left with any actual offensive abilities, Aizen states if he falls, the entire Gotei 13 will collapse in on itself, suggesting he should have come forth sooner.

When Yamamoto calls him arrogant for thinking he can actually cut him down, Aizen states he thinks nothing of the sort, for he has already cut him down. As Yamamoto tells him to be quiet, Aizen appears behind him.