is one piece episode 284 filler?

We rewind to the point just after Robin tearfully declares she wants to live. Back at the Courthouse, Mozu and Kiwi finally make it to the drawbridge levers atop the towers and throw them.

The Straw Hats feel the rumble and realize the drawbridge to the Tower of Justice is lowering. Soon the gap will be closed, and the Straw Hats can advance.

CP9 stands defiant, ready for the challenge. Back at the Courthouse, Baskerville declares he will stop the drawbridge.

Zambai and Paulie attempt to counterattack, but a shocking fact is revealed.