is one piece episode 99 filler?

Luffy and his crew say their parting goodbyes to the sand pirates. As they're leaving, Zoro questions the whereabouts of Luffy's brother, Ace.

Luffy claims that Ace would eventually show up out of nowhere, and the crew begins their journey to the city of Ido. Meanwhile, in Ido, a group of Camu's rebels are having a meal with the mayor, discussing the strength of their troops and telling how the rebel and royal army would soon have to clash.

Suddenly, one of Camu's men rushes up to him exclaiming about the arrival of sand pirates. Camu's decision was to run and hide, to the others' surprise.