There's no way. The Clintons called in every favor they ever owed to get through this last round and choked. If she entered the race this time, it'd be without all the advantages she had in the previous cycle, tangible and intangible (like coming off of a very successful term as Secretary of State).
No one is going to get out of the race for her, either. If this happens, she'd be one of the 15 or so Dems running, and probably not even an initial frontrunner.
I agree with the above. I do wonder if Hillary would be more appealing WITHOUT the gross advantages she had in 2016.
Everyone loves an underdog. No one likes an establishment-picked candidate, especially one for whom the decks were conspicuously cleared. If she is, indeed, vindicated over the e-mail/Clinton Foundation stuff over time, she MAY be more palatable as a candidate. Everyone who voted for her in 2016 will vote for her in 2020 and there may well be folks in WI, PA, and MI with buyers remorse over Trump that had been Democratic voters prior. I doubt that will happen however, and if it did, Hillary would screw it up by playing the "victim" card. "Victims" get hugs, sympathy, and consolation prizes, but they don't get 1600 Pennsylvania Ave.