In *Dune* the Baron kills Dr. Yeuh, who betrayed Duke Leto's family:

>Baron Harkonnen: I said I'd set her free. That you could join her.
So, join her.

He then turns his attention to motionless Duke Leto:

>Baron Harkonnen: **What do you think is next?**

Then the scene cuts to Paul and his mother finds Leto's ring during checking a bag.

Why did the Baron ask this question?