[I suspect the Dummyrats will force a brokered convention and nominate her.]
She’ll be Elizabeth Warren’s running mate. A surprise at the convention.
Warren will resign for health reasons or to spend more time with family. Or take a tragic walk in Ft. Marcy Park but the video cameras weren’t working. Hillary will reluctantly step into the Presidency while still in deep, deep mourning at the loss of her friend.
LOL - well, we’ll see what happens!
The scenario you suggested does not seem to be outside the realm of possibility, IMHO.