is attack on titan (shingeki no kyojin) episode 89 filler?

As Eren Jaeger guides the Wall Titans in their march, he considers how there has always been a wall of some kind before him. Armin Arlelt used to tell him of fantastic lands beyond the Walls, and Eren would imagine the people who could witness such things would be the freest people in the world.

Now he has arrived at that view, and it is littered with the bodies of those crushed by the Titans. After nightfall, their ship arrives in Odiha, which has already been abandoned, even though the Titans have yet to arrive.