is one piece episode 957 filler?

The Levely has come to an end, and the royal parties attending it have returned to their home countries. Neptune's family returns to Fish-Man Island accompanied by Garp, where he laments the tense and violent arguments that occurred during the Levely.

However, Garp brings up a certain incident that occurred concerning Arabasta. Previously, news of the incident were spread by Morgans, head of the World Economy Newspaper.

Morgans was threatened by a Cipher Pol agent to keep the incident private, but Morgans refuses, beating the agent.