I still think before the election/convention Hillary will drop out for ‘health’ reasons. The dim higher ups will ‘suggest’ she do that.
In comes Biden and/or Warren.
Perhaps but not until after the Rat convention where she is nominated, then she drops and her VP is the nominee. Doing it any other way would enrage the Sanders supporters and rip the Rat party to pieces. Just like giving the nomination to anyone but Trump would destroy the GOP.