is one piece episode 676 filler?

When Doflamingo took over, Kyros attempts to rescue King Riku from Doflamingo. He cuts off his leg and lunges at Doflamingo, only for Sugar to turn him into a toy.

Kyros (now Thunder Soldier) flees the palace with Riku, who does not remember him. Some day after the attack Scarlett was shot by Diamante when she went to get food for Rebecca.

Violet shook Kyros out of his flashback, when they noticed that extra soldiers are heading towards Doflamingo and with the element of surprise quickly slipping, the group prepares to attack Doflamingo.