is attack on titan (shingeki no kyojin) episode 25 filler?

In a church inside the Stohess District, there is a group of Wall worshipers in the middle of a ceremony. As a pastor recites the prayers, Annie in her Titan form falls on the building, killing many people.

The pastor, much to his horror, witnesses a Titan running towards the Walls. While civilians are running away or hiding in fear, Eren is running after Annie.

Watching this, Hange notes that this time Eren is retaining his control. Jean says that now as a Titan, Eren has to fight, however, Armin states that willpower is not enough to beat Annie.