is one piece episode 997 filler?

War ensues in Onigashima. Big Mom and Kaidou assume that the raid would be easily defeated, as Luffy only had a few hundred troops.

However, Queen gets a report that there are enemies in the thousands charging into Onigashima. The samurai troops join Zoro, the former Udon prisoners join Killer, and Kid and Law also join in on the battle.

Furthermore, at the shore, Marco and Perospero join forces and battle against Kaidou's troops. Hearing all these reports from his subordinates, Queen calls off the banquet, telling all the partygoers to enter battle and declaring an all-out enemy raid.