If she is truly as gifted and wonderful a person that she and others claim her to be...and people actually love and admire her dedication to public office and just how brilliant she is, but that she was robbed the Presidency by the Russians...she would absolutely be running in 2020. And given the quality of candidates, she'd be the frontrunner. She would run and finally defeat evil Trump and bring him and those pesky Russians to justice for deceiving the American people. What a story that'd be.
Unfortunately for her, it doesn't sound like anyone on the left has the appetite for her and see her as a significant liability, though I'm sure they won't tell her to her face since they want to live.
But maybe she'd entertain the idea of a VP role. Not saying the DNC would buy it, but you just know she wants to get in the White House one way or another.