In his funeral oration, Antony spoke to the people of Caesar's will. He told them of a bequest of money and property to the people of Rome. With blinding speed, Antony seeks to revoke that will, keeping the money and properties for himself, for Octavius, and for the third member of the triumvirate who will rule Rome, Lepidus. In this manner, you can confirm what you may already believe — that Antony has manipulated the people with his own advantage in mind.
The question, then, is not whether these men will respect Caesar's final wishes (they will not), but which of the three men now in power will dominate. Lepidus, who is, in effect, Antony's messenger, sent to retrieve Caesar's will, has no power. The real battle takes place between Octavius and Antony with no clear winner established. So why does Shakespeare concern the reader with this question? Because this power struggle is another aspect of the concern that desire and appetite are at the root of the destruction taking place in Rome. At first glance, one sees only the plebian mob being ruled by passion and standing ready to wreak havoc, but growing evidence shows that the conspirators and the triumvirate are as passionate as the mob.
Despite the fact that Brutus tries to convince himself that he kills Caesar because of logic and reason, he and the others are as much ruled by passion as anyone else. (For evidence of this, see Act II, Scene 1, where their passion is externalized and presented to the audience as disturbances in the natural world.) Brutus is unaware of his own emotional nature and denies it, thus losing its potential power.
