is one piece episode 639 filler?

After the B block battle royale has finished Bellamy is being taken away on a stretcher and as he passes Luffy he comments that he has not changed a bit, Luffy on the other hand disagrees and that he has changed. Bellamy laughs at this and tells Luffy that he is the one that has changed, commenting on his exceptional Haki, he then tells Luffy that the whole rooting for him thing has crushed his pride and calls him "Straw Hat", which gets the attention of Bartolomeo who is standing a couple feet away.