is one piece episode 842 filler?

Big Mom's attack on Judge shatters his helmet and takes him out. Niji and Yonji turn back to save their father, and as Caesar reaches the wall, he is confronted by Katakuri.

Niji and Yonji attack Big Mom before she can finish Judge off, and Ichiji attacks Katakuri, splitting him in half and saving Caesar, who flies in the opposite direction. Meanwhile, Sanji, Reiju, and Luffy are confronted by Smoothie, Daifuku, and Oven.

With Luffy still tired from using Gear 4, Sanji and Reiju go on the offensive.