I wouldn't be so sure. There was a story on Drudge a couple days ago that the Clinton's are putting the screws to the New York democrat party and trying to "buy" Chelsea a House seat (the Chappaqua seat where the sitting Dem is expected to retire in 2018). I have a feeling that they just consider Hillary's loss a temporary setback and are lining up Chelsea for a run in 2024 (I figure 2020 is too soon as she would only have two years in the House and beating a sitting incumbent President is always a risky proposition).
The Kennedy’s were never able to make it back to the Presidency despite their large family.
I suspect Chelsea’s skill level and the other crabs in the pot will keep Chelsea from rising too high in the party.
“the sitting Dem is expected to retire in 2018”
That Democrat has already come out publicly saying there is no way they would step down. And it would take along journey for Chelsea to become viable for a Presidential run...personally I don’t think the American public nor the DNC want anything to do with the Clintons anymore.