I've seen some amusing recommendations for casting in Part 2, like Nicolas Cage or Samuel L Jackson for the Emperor. Someone else suggested The Room actors for the Emperor, Feyd, and Irulan. 😂
And some other more seriously recommendations, but I honestly would prefer fresher faces. I trust that Villeneuve will nail it perfectly as he did for Part 1.
The film is even better on 2nd viewing, btw. And I think Villeneuve described Part 1 as sort of an appetizer for Part 2. So it's probably going to be bonkers.