is one piece episode 959 filler?

25 years ago, the Roger Pirates had a drunken feast at their ship. Kouzuki Oden expressed his appreciation for being able to join Gol D.

Roger on his voyage. Silvers Rayleigh, Shanks, and Buggy offered to help him in his quest to open Wano Country's borders, but Oden replied that he should handle this alone; he was confident that with the help of his retainers, he could become shogun and accomplish his goal.

In the present day, Act 3 of the Wano Country Arc begins. In Port Habu in Hakumai, Orochi boards a ship headed for the Fire Festival in Onigashima.

He drinks heavily in celebration.