Total BS unless Biden’s in on it. He resigns and turns the country over to her. He’s a hero and escapes responsibility when the country goes to hell.
And gets pardoned for all of his crimes.
Bingo!
Each of the parties is comfortable with the timeline. Joe gets to party for perhaps as much as a year while in the Oval Office and Hillary gets to work full time domestically and internationally "to set things up". A wonderful marriage of convenience.
If Bernie survives, she can always just buy him out at the convention with a similar deal. All of that and she has avoided what would have been a bruising, trying primary effort.