is one piece episode 592 filler?

The Yeti Cool Brothers radio in to Caesar, saying they successfully killed Nami, Zoro, and Brook, and ask that they be collected. In the research facility, Clown is talking to Monet, having just received the news that some of the Straw Hats were killed.

Monet is surprised that they died so easily, after reading all the newspapers that were written about them, and mentions that Law had encountered them twice before. Clown pulls out a gun, points it at Law, and asks him if he had called the Straw Hats to the island.