You mean their interaction with each other? Judging from the trailer, they don't spend a lot of time together in this one. I think Will's going to play it really cool with Jack. Will's really wised up so he is used to how Jack thinks/acts by now. He wants the Pearl and he's not going to make any false move with Jack that would keep him from having it. Also, he's going to be cold to him anyway since Jack and Liz shared that kiss.
Jack will most likely treat Will the same way he always does. But the thing is, they work brilliantly together. I wonder if that itself will change.