Banquo suspects that the Witches may be tricking Macbeth and he is the first to suspect Macbeth of murder. The Witches have predicted that Banquo’s descendants will become kings. Macbeth starts ...
Well, better late than never. China, he argues, is the ghost of Banquo who comes back from the dead to haunt the United States, the Macbeth of nations. I don’t know if he is right or not.
Another essential divergence is that Banquo is Macbeth’s accomplice ... Often played for comic relief after the murder of King Duncan, the porter scene is a dramatic curiosity.