Latest chapter makes me think that the “certain pirate” Shanks wanted to talk about is Kaido.
![](https://www.opfanpage.com/wp-content/uploads/2020/07/maxresdefault-1-4.jpg)
When Whitebeard began making his move towards Marineford to save Ace, Kaido attempted to take advantage of the situation to attack the Whitebeard Pirates.
![](https://www.opfanpage.com/wp-content/uploads/2020/07/20160718163814.jpg)
To the horror of the Marines, reports came in that Shanks had intercepted Kaido, creating a dispute between two of the Four Emperors. The two captains ended their confrontation with a stalemate.
![Questa immagine ha l'attributo alt vuoto; il nome del file è maxresdefaultdewde.jpg](https://www.opfanpage.com/wp-content/uploads/2020/07/maxresdefaultdewde.jpg)
It was probably at this point that Shanks realized Kaido’s appetite for destruction and he decided to warn the Five Elders that escalating a war with Kaido would only bring casualties in an unprecedented scale which is exactly what Kaido’s after.
![](https://www.opfanpage.com/wp-content/uploads/2020/07/8713zx7i6oa41-1024x408.png)
Chapter 907 itself revolves around the Rocks Pirates and the debt Kaido owed to Big Mom, so I wouldn’t be surprised if Shanks knew a few things about this monster and wanted to give a heads up to the World Government.