For real though, who do the Dems run after Biden?

I thought that during the 2020-2024 interim the Democrats were supposed to be building someone up for the next generation of the party. To no one's surprise, they've been doing exactly fuck-all for four years - but, for insiders who actually care about the party's future, who are they hanging their hat on? Voters' confidence in Kamala has tanked; Cuomo was maybe their man until the sexual harassment charges hit (side question: how was he able to skate on the nursing home scandal?). But anyway, who's the next empty neoliberal they'll run in future elections?