I guess,according to some people's definition,that all of Oda's One Piece cover stories are nothing but filler -_-.You people are using the wrong noun.It's a SIDE STORY not filler,now whatever adjective goes in front of the noun is up to you ^^.
Funny enough,this side story would have been perfect for a cover story style of telling.Though,instead of saying Hiro is copying of Kishimoto,people just say he's copying of Oda again.
Anyway,eh whatever.It's was an alright chapter.Now,should I call the morgue about the coming body count.