Comment on  the usage of prophecies and riddles throughout the play to communicate messages instead of directly communicating.(3 weird sisters and Lady Macbeth.. example) Comment on the usage of ambigous and equivocate language. Also in the introduction ( don't jump right in) if you can for example link it to the timeline when Macbeth was written. You could bring up the boroque dressing style and how people dressed to show of their status and wealth.