1) Donald Trump was under the total or partial control of Russian Operatives/Agents. If this was the case, a U.S. Federal Court criminal indictment may accompany the report shortly thereafter. The president is not above the law.
2) Congress impeachment procedures may start when the Mueller report is released.
3) There was no collusion with the Russians.
4) Donald Trump resigns, and Pence takes over and issues an executive pardon for Donald Trump?
What is your opinion, if you have one?