is attack on titan (shingeki no kyojin) episode 75 filler?

As Floch Forster and the other Jaegerists escort Hange Zoë, they hear an explosion off in the distance. As they ponder what it could be, Hange recognizes it as an explosion caused by a Thunder Spear.

Nearby, a mutilated Zeke Jaeger slowly succumbs to his wounds from Levi Ackermann's Thunder Spear. After dying, one of the Titans Zeke had created regenerates and crawls up to his body.

It rips open its abdomen and picks up Zeke's corpse, shoving it into the wound.