If Biden is elected, he will not last more that a few months, especially if the Dems take the Senate. They will push him out, perhaps with his #MeToo accusers, or if they have to they will impeach him on some grounds or another and install his VP. The VP is the real candidate.
The real issue is who the VP will be a front for--most likely the Obama crowd. Not the Clintons, their power is fading.
Can you imagine Susan Rice or Kamala not doing EVERYTHING Obama and/or Valerie Jarrett want?