Yeah?
Greenbull literally understood everything Shanks was saying, and to whom was Shanks talking?
You good, bro?
Sorry but GB knows how Shanks operates.
GB knows he would woop Shanks without alliance and crew helping him.
Just like Shanks knew GB would whoop alliance and had to ambush.
Not to mention GB was right next to alliance so he would also have to fight force stronger than like 6 yonko.
Last time I was not talking about Kaido