At this point my money is on Biden picking Michelle Obama. That would be a sure win for the Democrats, and in effect provide a third term for Barry.
Yes, I know she has said repeatedly she will not run for President, but being picked for VP would not be running for POTUS. She would become President by default when Biden resigns. He did say recently that whoever he picks for the VP slot needs to be capable of being President from day one. That remark went by mostly unnoticed by the MSM.