is one piece episode 570 filler?

Robin and Neptune continue their conversation, and Robin mentions that there are three ancient weapons: Pluton, Uranus, and Poseidon. Neptune then warns her not to tell anyone about Shirahoshi in fear that the government and pirates would hunt her.

However, Caribou is eavesdropping on their conversation and goes to kidnap Shirahoshi. Meanwhile, Jinbe tells Luffy and the Straw Hat Pirates about the major events that took place during the timeskip.

The first is Aokiji and Akainu's duel to decide who will become the new fleet admiral, which Akainu won after ten days of fighting.