In Act V, Scene 2 of Shakespeare's Macbeth, what is Macbeth rumored to be

doing in preparation for the coming war?

Macbeth seems to be preparing his army in full rage is what is rumored to be doing in preparation for the coming war.

Explanation:

Malcolm with his army approaches the castle of Macbeth disapproved by the duties of Macbeth and comes with an army to capture him and take away the throne.

Macbeth seems to be preparing his army in full rage is what is rumored to be doing in preparation for the coming war. However, Macbeth tries to save himself by taking shelter in his castle hoping the doctor to heal his wife in the mean while.

However, Macbeth goes to the battle and asks to be hanged outside the castle and accepts his end for his cause.