Click to read a passage from macbeth by william shakespeare. then answer the question, how does macbeth feel about duncan's plans for his son? o a duncan tells macbeth that he is going to make macbeth his heir rather than malcolm, his son. ob duncan learns that macbeth doesn't think malcolm is worthy of becoming duncan's heir oc macbeth has "black and deep desires regarding duncan's son and heir, malcolm od macbeth and duncan are great friends and are making plans to combine their fortunes