User blog comment:Ghmorello/Chapter 925: The King And Queen Of Thanksgiving/@comment-5386071-20181123190129/@comment-2600:1702:3C50:A6E0:951E:E740:AD4C:18E8-20181125035555

Kaido's reporters don't know, but Big Mom did speak to Kaido stating that she was going to kill Luffy and that conversation was overheard by the navy. Someone might have decided to release the news of where the Strawhats were likely to go since if they want to challenge Kaido, they need to go to Wano where he seems to currently reside.