is bleach episode 137 filler?

In Sousuke Aizen's throne room in Las Noches, as the motionless body of Ulquiorra Cifer seemingly lies bleeding on the ground, Aizen enters the room and releases his Shikai, Kyōka Suigetsu, causing the body and its blood to shimmer and disappear in a burst of light before Aizen sheathes his Zanpakutō and sits on his throne to rest his chin against his hand and smile. Commenting on how elaborate this was, Gin Ichimaru emerges from the doorway and enters the throne room as well.