I'm going to send murderers to kill Banquo while he is on his way from the banquet.
In Act 3 of Macbeth there was plenty of significant things that happened which builds tension from other characters to Macbeth. He feels as if he may be almost on the verge of fulfilling the prophecy but his actions towards it aren't complete yet.
Scene 3 and 4
We killed Banquo, but Fleance got away.
How could you let him get away!!!
Banquo meets up with Macbeth and he discusses how he is very happy for Macbeth becoming the new King of Scotland. Macbeth also invites him to his banquet after the coronation.
Make sure that you summon false visions to Macbeth to scare him!
Macbeth also meets up with his wife and tells her the plans about what they are going to do to Banquo and his son, Fleance.
Scotland is in such of a mix right now.
Perhaps, I can be of some help.
The murderers were able to kill Banquo, but they didn't succeed in killing Fleance and this angered Macbeth.
Hectate meets the three witches and she scolds them because they have intervened in Macbeth's life without her permission. She then tells them to give Macbeth false visions to scare him of the future.
Lennox meets with another lord and they talk about how Malcolm and Macduff are trying to ally with England so that they can invade Scotland and take Macbeth off the throne.