is one piece episode 441 filler?

While Luffy is being cheered on by the crowd, Mr. 2 faints. The reason why is not because of his wounds but the way he cheered Luffy on while he was screaming.

Later on, Emporio Ivankov discovers that Bon Kurei came to rescue him, but declares it is not the proper time to break out yet since the Revolutionary, Monkey D. Dragon, has not made his move yet.

Luffy tells Iva-chan that Dragon is his father. After Ivankov give his speech, he finally realizes that Luffy just said that he is the son of the Revolutionary.

He is thrown back by surprise. Then he asks where Luffy is from.