If it can produce alot of money then yeah I can see them doing a rematch. Floyd is still in the news and wants to be in the spotlight again so it could very well happen.
Just look at Mcgregor he wants a rematch just for the money. So why not pacquiao?
McGregor/Pacquiao needs Floyd much more than Floyd needs McGregor/Pacquiao.

But probably Floyd is thinking about a different opponent. And he is right when he prefers someone else. A fresh opponent may bring him more revenue when compared to a repeat rival. On top of that Floyd is already 42 years old and he knows that the time window for him is running out.